Growing Marijuana Indoors

This entry was posted on 10.15th, 2020 by BESTVA

If you’re reading this, that means you’re ready to start growing your own medicine, and that's huge! Once you get the hang of growing you'll hardly ever need to purchase your own medicinal plants (or any plants, really) ever again.
But with great power comes great responsibility, so before we get started take a breath because we're diving deep into plant growing.
By deep we mean deep. Mediums, nutrients, temperatures, pest control, lighting schedules and much more. Think you're up for you?

Trust us, you're more than capable of growing cannabis (or marijuana, whichever you prefer to call it). All you need is a little guidance and you're on your way to becoming the grower you always knew you could be, getting big yields in no time.
"Are you sure I can grow my own marijuana?"

Of course, and then some! This guide is best for flowering and fruiting crops. While this guide is geared toward growing marijuana indoors -particularly legal recreational and medicinal marijuana cultivation- you'll find the information here also works for fruits, flowers, and vegetables.
So if you need to know everything you need to know about growing marijuana/cannabis, how to harvest it, and how to keep a good amount on hand all year long, this is the guide's your key to unlocking big time yields.
Ready? Let's get started!

PREPARATION

There's more to preparation than just clearing a space in your home or apartment to set up a grow room or grow tent. Much more.
From figuring out what kind of grow lights you're going to use to finding the right plant for your setup, prepping each grow is vital to your garden's success.
Throughout this Preparation section, we'll show you what you need to figure out what sort of plants you'd like to grow, where to grow them, and what you need to do to prep your garden to start growing.

Choose Your Strain

Choosing a stain is the first thing you should think of before starting your grow. As you've heard- and will probably hear a lot in this guide- all plants are different and will require different growing environments.

For example, sativa plants like to grow very tall and give off smaller buds come harvest time. Kushes and cookie cannabis strains (hybrids and indicator plants) tend to be bushier and can give you fatter buds come harvest time. Each of these types of plants will require their own growing environments, nutrition, and training methods to give you the yield you're after.
That's why we suggest doing research on strains you're interested in and choosing the one that'll be best for you and your growing conditions.
Not sure what to look for? No problem. Here are some key aspects you should think of when looking for the best strain for your grow:

1.Overall size of the full-grown plant- Like we mentioned above, the overall size of a strain is important to know for two reasons:

Garden size- If you know the full-grown size of the strain you want to grow you'll get an idea of how big of an area you'll need to use. Size can also tell how many plants you can grow in that area, and we all know size=yield.
Lighting- It's important to know how big your plant will be so you can figure out how strong your lights need to be. Too strong of a light and your plants will fry, too weak of a light and your plant won't grow. Depending on plant size and count you'll be able to calculate how many lights you need and how to position them in your grow.

2.Average yields- You'll want to get an idea of the yield your strain usually gives off in terms of quality, quantity, and size. A few questions you'll want to ask when strain hunting are:

Will the harvest consist of fat or smaller buds? The bigger the bud the more nutrition and lighting you plants need. Make sure you know what you're going to harvest so you can give your plants all the time and nutrition they need (not to mention getting big the right size jars to cure them in)
How much should you expect to yield? We all know that yield is largely based on how well you care of a plant, but there's also a realistic expectation you should keep in mind when growing. If you're expecting huge yields out of plants that don't traditionally put out big yields you might be disappointed. Make sure you get the strain that gives you a yield you want.

Long day plant vs Short day plants- Short day plants (SDP's) require a good amount of darkness and short periods of light. Long day plants (LDP's) want long periods of light and short periods of darkness. This is important to understand because each plant type needs their own specific feeding, lighting, and environmental requirements and they usually don't mix well with one another (we'll get in to that subject in a bit).

Flowering times- This one is vital (especially for cannabis growers). Some plants take longer than others to flower, but if you're not sure how long your flowering period is supposed to be you could either flower for too long or undercut your plants' true flowering time, leading to an underwhelming harvest
Choosing genetics isn't only about the species of plant you get. It also involves what state you receive those genetics in, and there are two main ways to start plant life: seeds and clones.

1 Seeds- When you start your garden the old fashion seed-in-the-ground way, you open up your future grow to a lot of benefits:
Seeds are perfect for first time growers- We feel it brings your closer to your plants and makes you a better grower once you know how it's done naturally.
Seeds are the source of all genetics- Whether you want to create your own strain or you want to hone in on the traits of a particular strain, you'll need to breed your plants. While seeds aren't 100% necessary to start growing, they are vital in breeding and enhancing strains.

Growing from seeds can often lead to more resilient plants- Keep in mind that a clone's job is to grow an entire plant from one leaf/clipping. Clones start off from a place of restoration, which can be taxing for the wrong clipping. Starting from a seed and keeping them well maintained usually results in stronger plants than clones.

2.Clones- Clones will get you up and running quickly. That's why you usually see growers opt for clones over seeds, because while seeds might give you a stronger plant, seeds can't tell you the sex of the plant until it's too late. That's not all:

With clones there's no need to pop seeds and possibly waste them. For example, if you pop seeds wrong and they don't grow or you get a plant you weren't looking for (we can't tell you how many growers needed females and grew males).

Clones are already on its way toward a full grown plant and are identical to the plant it's cloned from, so you'll know the sex is what you need it to be ever time.
Clones are perfect for growers who would like a quick turn-around. Popping seeds and then growing seedlings can be tricky, and while raising clones can also be tricky, rooting clones can be done pretty quickly. 
Hands down, if you want to grow right away consider finding or taking clones

Choosing Your Grow Tent/Grow Room/Green House

Once you've figured out the type of plant you're looking to grow and how you want to start your garden, the next thing you'll want to look in to is where you're going to house your plants.
Are you going to buy a grow tent? Want to build a green house? Do you want to plant straight in the ground outside, or do you want to convert a room in your home or apartment?

These are the questions you'll want to think about when getting all of the pots, seeds, or clones to get started.
But before you get down to figuring out what sort of housing you want for your plants, you'll first want to figure out the canopy (the area of plants you're going to light) of your grow. To do that, there's a two-step approach:

1. How much space do you want to allocate for your grow room- To know how big your garden can be, you have to know the grow space's limitations. Before you buy your clones or a bag of seeds, measure out the area you want to use to grow your plants to get an idea of how many plants you can hold in that space

2.How many plants can you grow in that space- As a good rule of thumb, if you're not sure how big your buckets are going to be in that growing space, give your plants 2-4 sq.ft. per plant in that space you just measured. Divide that number by 2, 3, or 4 to figure out how many full-grown plants can live comfortably. The minimum is 1 sq.ft. per plant, so you may need to grab some buckets and measure it out yourself.

After you've measured out your space and have an idea of what it'll take to grow your garden, let's talk about how you're going to house them. we believe there's essentially three types of ways you can house your plants:

1.Grow Tents- Probably the most common among indoors growers, grow tents are increasingly convenient way of growing and housing your plants. Whether you need a place in your garage, somewhere in your room, or you need a tent the size of a whole room, you can likely find the tent you need to grow most any plant you can think of.
Tents come in a wide range of styles and sizes for any grower and nearly any plant
With a tent there's no need to drill/mount hanging hooks or vents for lights and fans

In tents you have superior control over grow environment than in most other setups

2.Grow Room- No matter if it's a closet, your bedroom, a garage, or a room in your house or apartment, there's no doubt that utilizing your own space can be more convenient than buying a tent. You can get fresh air in quicker and circulate it naturally throughout your garden.
In a grow room there's no need to purchase a whole new tent, just equipment like reflective material and some fans to convert your room (which can be cheaper than a tent depending on the canopy you plan to grow)

Grow rooms utilize the space you already have, including windows (ventilation) and power outlets so again, there's not too much to purchase to convert a room in to the grow of your dreams
Bonus: in the right setting, you can utilize light from the sun to supplement light when lights are out or dying
Photo: Daily Express

3.Greenhouse- When growing inside just won't happen but you don't have tons of room outside either, think about building or buying a greenhouse. In a greenhouse you get all of the benefits of growing outdoors (temp, abundance of light) with the added benefit of indoor growing (supplemental lighting and ventilation)
In a greenhouse you tend to save money on lighting by utilizing the sun’s light, which is actually one of the most optimum light sources available
In the event you need extra lighting you only need T5's or lower powered HID's to hold you over until the sun comes back out (though you can always use LED or high powered HID's, too)

There's also plant training techniques like Light Dep that help you get bigger plants in greenhouses
Because they're already partially acclimated to outdoor environments, you have the potential to take greenhouse-grown plants out of the green house and plant them directly outside without lots of training like you would bringing indoor plants outside

Choosing Your Medium (Soil/Hydro/Coco)

Once you have an idea of the strain you want to grow and where you want to grow it, now comes the stage of preparation that's probably the most important part: choosing the medium you want to grow in.

Your medium will determine how many nutrients you use, what type of nutrients you'll use, how you feed your plants, and how challenging correcting issues will be.
There are three popular grow mediums to choose from with their own advantages and disadvantages, so be sure you make the right decision before growing those plants:
Soil is the perfect all-purpose medium. Most soil doesn't need much supplemental nutrition because it's already loaded with nutrients. Heck, if you mix up your own super soil you can even eliminate around 90% of supplemental nutrition and just use water for the majority of a plant's life.

Pro's
Great for beginners, lots of buffer room in terms of feedings and readings
Retains nutrients the best of all mediums (Needs little nutrients when you start, and all you do is add a little when your plants need them)

Con's
Plants generally take longer to grow in soil

Nutrient issues may not show up right away, and when they do it can be difficult to quickly fix (plants can get so sick in soil they’re beyond repair)
Unlike hydro where roots will hang down in bucket, soil roots go all over the place and if you don’t have enough room for those roots you’ll get root bound plants, and those are never good
Hydroponics is an all-water soil-less way of growing medium. It's a lot less messy than dirt, and if you run in to nutrient problems they're much easier and faster to fix than soil problems. Hydroponic grown plants even take less time than soil plants to harvest.

Pro's
Nutrients are absorbed much faster than in soil
Hydro is usually faster growing than soil or coco
Recommended Skill Level: Advanced, Professional

Con's
There's no buffer when growing with hydro like there is with soil- one wrong step and your plants are going to feel it
Nutrient issues may be easier to fix than in soil, but you're likely to get more nutrient spikes with hydro than in soil
Because of moisture collection at the root level, basins and water sources need to be constantly checked and cleaned to prevent mold, fungus, and root rot
Coco is the perfect middle ground between hydroponic and soil mediums. Though there's no nutritional value to coco like with soil the nutrition it receives tends to be held in longer than hydroponic applications. That means you won't have to run such a heavy flow of water like you would in hydro, yet you can assure your plants are getting nutrition from the very beginning instead of trusting soil has enough to carry you through to flowering

Pro's
Retains nutrients much better than hydro but doesn’t hold on to them too long like soil can
These generally take a little longer than hydro to grow, but tend to grow a little faster than soil
Recommended Skill Level: Advanced, Professional

Con's
Nutrient issues can be tricky to resolve due to the semi-retainable medium
Not a ton of buffer when working with coco
If you don’t break down or mix coco properly you can spike the pH levels of your plants and harm them


Choose Your Strain

Choosing a stain is the first thing you should think of before starting your grow. As you've heard- and will probably hear a lot in this guide- all plants are different and will require different growing environments.

For example, sativa plants like to grow very tall and give off smaller buds come harvest time. Kushes and cookie cannabis strains (hybrids and indicator plants) tend to be bushier and can give you fatter buds come harvest time. Each of these types of plants will require their own growing environments, nutrition, and training methods to give you the yield you're after.
That's why we suggest doing research on strains you're interested in and choosing the one that'll be best for you and your growing conditions.
Not sure what to look for? No problem. Here are some key aspects you should think of when looking for the best strain for your grow:

1.Overall size of the full-grown plant- Like we mentioned above, the overall size of a strain is important to know for two reasons:

Garden size- If you know the full-grown size of the strain you want to grow you'll get an idea of how big of an area you'll need to use. Size can also tell how many plants you can grow in that area, and we all know size=yield.
Lighting- It's important to know how big your plant will be so you can figure out how strong your lights need to be. Too strong of a light and your plants will fry, too weak of a light and your plant won't grow. Depending on plant size and count you'll be able to calculate how many lights you need and how to position them in your grow.

2.Average yields- You'll want to get an idea of the yield your strain usually gives off in terms of quality, quantity, and size. A few questions you'll want to ask when strain hunting are:

Will the harvest consist of fat or smaller buds? The bigger the bud the more nutrition and lighting you plants need. Make sure you know what you're going to harvest so you can give your plants all the time and nutrition they need (not to mention getting big the right size jars to cure them in)
How much should you expect to yield? We all know that yield is largely based on how well you care of a plant, but there's also a realistic expectation you should keep in mind when growing. If you're expecting huge yields out of plants that don't traditionally put out big yields you might be disappointed. Make sure you get the strain that gives you a yield you want.

Long day plant vs Short day plants- Short day plants (SDP's) require a good amount of darkness and short periods of light. Long day plants (LDP's) want long periods of light and short periods of darkness. This is important to understand because each plant type needs their own specific feeding, lighting, and environmental requirements and they usually don't mix well with one another (we'll get in to that subject in a bit).

Flowering times- This one is vital (especially for cannabis growers). Some plants take longer than others to flower, but if you're not sure how long your flowering period is supposed to be you could either flower for too long or undercut your plants' true flowering time, leading to an underwhelming harvest
Choosing genetics isn't only about the species of plant you get. It also involves what state you receive those genetics in, and there are two main ways to start plant life: seeds and clones.

1 Seeds- When you start your garden the old fashion seed-in-the-ground way, you open up your future grow to a lot of benefits:
Seeds are perfect for first time growers- We feel it brings your closer to your plants and makes you a better grower once you know how it's done naturally.
Seeds are the source of all genetics- Whether you want to create your own strain or you want to hone in on the traits of a particular strain, you'll need to breed your plants. While seeds aren't 100% necessary to start growing, they are vital in breeding and enhancing strains.

Growing from seeds can often lead to more resilient plants- Keep in mind that a clone's job is to grow an entire plant from one leaf/clipping. Clones start off from a place of restoration, which can be taxing for the wrong clipping. Starting from a seed and keeping them well maintained usually results in stronger plants than clones.

2.Clones- Clones will get you up and running quickly. That's why you usually see growers opt for clones over seeds, because while seeds might give you a stronger plant, seeds can't tell you the sex of the plant until it's too late. That's not all:

With clones there's no need to pop seeds and possibly waste them. For example, if you pop seeds wrong and they don't grow or you get a plant you weren't looking for (we can't tell you how many growers needed females and grew males).

Clones are already on its way toward a full grown plant and are identical to the plant it's cloned from, so you'll know the sex is what you need it to be ever time.
Clones are perfect for growers who would like a quick turn-around. Popping seeds and then growing seedlings can be tricky, and while raising clones can also be tricky, rooting clones can be done pretty quickly. 
Hands down, if you want to grow right away consider finding or taking clones

Choosing Your Grow Tent/Grow Room/Green House

Once you've figured out the type of plant you're looking to grow and how you want to start your garden, the next thing you'll want to look in to is where you're going to house your plants.
Are you going to buy a grow tent? Want to build a green house? Do you want to plant straight in the ground outside, or do you want to convert a room in your home or apartment?

These are the questions you'll want to think about when getting all of the pots, seeds, or clones to get started.
But before you get down to figuring out what sort of housing you want for your plants, you'll first want to figure out the canopy (the area of plants you're going to light) of your grow. To do that, there's a two-step approach:

1. How much space do you want to allocate for your grow room- To know how big your garden can be, you have to know the grow space's limitations. Before you buy your clones or a bag of seeds, measure out the area you want to use to grow your plants to get an idea of how many plants you can hold in that space

2.How many plants can you grow in that space- As a good rule of thumb, if you're not sure how big your buckets are going to be in that growing space, give your plants 2-4 sq.ft. per plant in that space you just measured. Divide that number by 2, 3, or 4 to figure out how many full-grown plants can live comfortably. The minimum is 1 sq.ft. per plant, so you may need to grab some buckets and measure it out yourself.

After you've measured out your space and have an idea of what it'll take to grow your garden, let's talk about how you're going to house them. we believe there's essentially three types of ways you can house your plants:

1.Grow Tents- Probably the most common among indoors growers, grow tents are increasingly convenient way of growing and housing your plants. Whether you need a place in your garage, somewhere in your room, or you need a tent the size of a whole room, you can likely find the tent you need to grow most any plant you can think of.
Tents come in a wide range of styles and sizes for any grower and nearly any plant
With a tent there's no need to drill/mount hanging hooks or vents for lights and fans

In tents you have superior control over grow environment than in most other setups

2.Grow Room- No matter if it's a closet, your bedroom, a garage, or a room in your house or apartment, there's no doubt that utilizing your own space can be more convenient than buying a tent. You can get fresh air in quicker and circulate it naturally throughout your garden.
In a grow room there's no need to purchase a whole new tent, just equipment like reflective material and some fans to convert your room (which can be cheaper than a tent depending on the canopy you plan to grow)

Grow rooms utilize the space you already have, including windows (ventilation) and power outlets so again, there's not too much to purchase to convert a room in to the grow of your dreams
Bonus: in the right setting, you can utilize light from the sun to supplement light when lights are out or dying
Photo: Daily Express

3.Greenhouse- When growing inside just won't happen but you don't have tons of room outside either, think about building or buying a greenhouse. In a greenhouse you get all of the benefits of growing outdoors (temp, abundance of light) with the added benefit of indoor growing (supplemental lighting and ventilation)
In a greenhouse you tend to save money on lighting by utilizing the sun’s light, which is actually one of the most optimum light sources available
In the event you need extra lighting you only need T5's or lower powered HID's to hold you over until the sun comes back out (though you can always use LED or high powered HID's, too)

There's also plant training techniques like Light Dep that help you get bigger plants in greenhouses
Because they're already partially acclimated to outdoor environments, you have the potential to take greenhouse-grown plants out of the green house and plant them directly outside without lots of training like you would bringing indoor plants outside

Choosing Your Medium (Soil/Hydro/Coco)

Once you have an idea of the strain you want to grow and where you want to grow it, now comes the stage of preparation that's probably the most important part: choosing the medium you want to grow in.

Your medium will determine how many nutrients you use, what type of nutrients you'll use, how you feed your plants, and how challenging correcting issues will be.
There are three popular grow mediums to choose from with their own advantages and disadvantages, so be sure you make the right decision before growing those plants:
Soil is the perfect all-purpose medium. Most soil doesn't need much supplemental nutrition because it's already loaded with nutrients. Heck, if you mix up your own super soil you can even eliminate around 90% of supplemental nutrition and just use water for the majority of a plant's life.

Pro's
Great for beginners, lots of buffer room in terms of feedings and readings
Retains nutrients the best of all mediums (Needs little nutrients when you start, and all you do is add a little when your plants need them)

Con's
Plants generally take longer to grow in soil

Nutrient issues may not show up right away, and when they do it can be difficult to quickly fix (plants can get so sick in soil they’re beyond repair)
Unlike hydro where roots will hang down in bucket, soil roots go all over the place and if you don’t have enough room for those roots you’ll get root bound plants, and those are never good
Hydroponics is an all-water soil-less way of growing medium. It's a lot less messy than dirt, and if you run in to nutrient problems they're much easier and faster to fix than soil problems. Hydroponic grown plants even take less time than soil plants to harvest.

Pro's
Nutrients are absorbed much faster than in soil
Hydro is usually faster growing than soil or coco
Recommended Skill Level: Advanced, Professional

Con's
There's no buffer when growing with hydro like there is with soil- one wrong step and your plants are going to feel it
Nutrient issues may be easier to fix than in soil, but you're likely to get more nutrient spikes with hydro than in soil
Because of moisture collection at the root level, basins and water sources need to be constantly checked and cleaned to prevent mold, fungus, and root rot
Coco is the perfect middle ground between hydroponic and soil mediums. Though there's no nutritional value to coco like with soil the nutrition it receives tends to be held in longer than hydroponic applications. That means you won't have to run such a heavy flow of water like you would in hydro, yet you can assure your plants are getting nutrition from the very beginning instead of trusting soil has enough to carry you through to flowering

Pro's
Retains nutrients much better than hydro but doesn’t hold on to them too long like soil can
These generally take a little longer than hydro to grow, but tend to grow a little faster than soil
Recommended Skill Level: Advanced, Professional

Con's
Nutrient issues can be tricky to resolve due to the semi-retainable medium
Not a ton of buffer when working with coco
If you don’t break down or mix coco properly you can spike the pH levels of your plants and harm them


Choosing Your Grow Lights

We're almost done with the vitals of what you need to get started! Take a breath, we're almost ready to start growing.
After this step, all you have to do is grab some tools, nutrients, fill those buckets, and get going. But before we get to the easy stuff we have to figure out one last thing: what sort of light you're going to use to grow your plants.
Your light's one of the last things that are going to determine how much you'll be able to yield, how challenging it will be, and how much energy you're going to consume growing your plants.

As with most things in the grow room, all types of light you can use have their pro's and con's in the garden. Some add tons of heat to your grow, others don't give you enough power, and some even have too much power without adding a degree of temperature to your grow room's environment. Be sure to look at the benefits and challenges with each light before growing your plants under them:

High Intensity Discharge (HID) Grow Lights: HPS (High Pressure Sodium), Metal Halide (MH), Double Ended (DE) HPS/MH, Ceramic Metal Halide (CMH) Grow Lights
HID's offer the closest light to the spectrum of the sun (HPS and MH bulbs)
These give you the intense light necessary to grow big, healthy plants with huge yields from start to finish (especially when trained properly)
Wide range of reflectors and wattages to suit any grower’s needs, so there's bound to be an HID for any application you need
Manufacturers like BESTVA LED LIGHT can grow anything under the sun: flowers, fruit, veggies, herbs, spices- anything, especially marijuana

Wattage Recommendations:

Standard grow lights (regular HPS/MH) are your run-of-the-mill lights
600w Grow Lights offer good coverage for 1-3 plants in a 2x4ft or 3x3ft area
1000w Grow Lights are strong enough for 3-4 plants in a 4x4ft or 5x5ft area
4000w Grow Lights are the strongest of all standard grow lights and can grow around 5-6 plants in a 6.5x7ft area
Double ended grow lights are much more intense than standard single ended bulbs because of the dual base connections they offer, firing from two connections instead of a single connection at the base of the bulb

1500w's are intense versions of their standard counter parts and can cover a 4x4ft or 5x5ft area with ease
4000w's are probably some of the strongest lights on the market, and can cover 6x6ft and 8x4ft growing spaces easily
CMH Grow Lights give you an even spectrum of light without too much blue or red spectrum. These lights have a ceramic base that will outperform single and DE lights of similar wattages because of their ability to fire at high wattages
315w's are strong enough to cover a 2x4ft or 3x3ft growing space without pulling all of the energy a 1000w light would
630w's will be able to cover a 6.5x7ft area with light easily without using the energy a 4000w light would

LED Grow Lights: Giving your plants the exact spectrums they need and nothing they don't, LED's are a great way to give your plants the light the need without giving them excess heat or spectrums they can't use

LED's have the ability to pinpoint the exact wavelengths of light plants absorb and gives them that- nothing that the plant will waste like HID’s do
Yield quantity may not be as much as HID’s but LED yields tend to give you more flavorful, sticky, and overall higher quality harvests
Intense spectrums from HID’s can give your plants properties that other lights may not (i.e. UV and IR for resin)
The light generated has intense wavelengths, so moving them in too close will cause bleaching to your plants

LED manufactures like Advance Spectrum MAX, specifically engineer the light spectrum for marijuana growing:
Supplemental grow light lights (14-50w range, with a few high powered lights)
These lights offer a limited spectrum range (all blue, all red, dual or tri-band)

LED's fill in gaps of light your main lights are missing

These are used for very specific purposes, so they're not great on their own unless you’re growing grass or herbs
Full Spectrum LED Grow Lights (180w-1000w range)
Full spectrum LED's give your garden a wide light spectrum that covers pretty much all spectrums you plants need. The problem with HID's is that they give plants too many spectrums to process, and plants end to waste them.
These tend to outperform an HID of the similar wattage in terms of quality. For example, a 1000w LED will outperform a 1000w HID with the same spectrum output because of the spectrums LED's offer

T5 Grow Lights: Offering a limited amount of heat, these lights are similar to HID's because they have "grow" (vegging) and "bloom" (flowering) spectrums and much more. Despite their limited power and lower-yielding harvests, T5's are a great alternative for growers who want to grow marijuana plants without using lots of energy and without bleaching plants like LED's can

You can grow nearly anything with these, but because they’re not as strong as other lights those plants will remain pretty small
T5 grow lights run 75% cooler than HID’s

Yields are generally small with these lights, but they will definitely work to get you a yield in a pinch
Wide range of sizes to cover the canopy you want to grow
Great for herbs, spices, clones, and growing flowering plants like cannabis in a pinch
A common assumption amongst rookie plant growers is that the more you water, the better.
While this is true to an extent, there is such a thing as “too much water.” Overwatering your indoor cannabis plants can prove detrimental to their productivity, and potentially kill them!

The frequency of watering and the amount you give is determined by a few obvious things. These include the size of the plant and the stage of development that it’s in. For example, cannabis plants in vegetative growth don’t require as much watering as mature plants in the flowering stage. However, there’s no exact science when deciding how much water to give and how often.
For instance, lots of people only choose to water once the leaves start noticeably drooping. After all, over-saturated root systems, especially in cannabis plants, are prone to fungal diseases.

Make sure there are holes drilled into your growing container so the water can drain out. When watering, try, and only moisten the soil rather than saturating it.
Lastly, many growers fill up a jar or spray bottle from their tap. Bear in mind that this could harm the plants if there is too much chlorine or unfiltered minerals in it. You may want to choose a distilled option or at least filter it before adding it to your soil. Mineral-laden tap water can cause unwanted build-up in the cannabis root systems, which can lead to detrimental root disease.

MAINTAINING OPTIMAL TEMPERATURE AND HUMIDITY

Like any other plant, cannabis thrives in specific environmental conditions. Temperature and humidity are arguably the biggest external factors influencing the health and growth of your plants.

During veg, daytime (or lights-on) temperatures should be kept between 22–28°C, while relative humidity should sit between 40–70%. Sativa strains can tolerate slightly warmer, more humid conditions than indicas. Lights-off temperatures during veg should sit between 18–23°C.
During flowering, you’ll want your room temperature to sit between 20–26°C. Your humidity shouldn’t exceed 50% to avoid bud rot and other fungal issues during this critical time. In the last 2 weeks of flowering (as you flush your plants), consider dropping your temperatures even further to 18–24°C, with humidity levels of 30–40%.