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Grow Medical Cannabis Easy in Your Home or Apartment

With an increasing number of states that allow legal personal cannabis grows, it was inevitable that a whole new market would take off. People want control of their medicine. And what better way to gain control than to grow it yourself ? You can grow weed easy at home, but it does require some equipment, and a small investment.

What do you Need for Growing Cannabis?

Before you start planning to grow your own cannabis, there are a few things to do. First things first: check the legality. Run it by landlord, familiarize yourself with local laws, and price in the cost of electricity required for a grow to make sure it’s within budget. Don’t jump in without thorough research. There’s a checklist for the full run down.

If you’re a beginner, then you’ll want to select your strains carefully. Some are easier to grow than others. But once you’re equipped with seeds, here’s what you’ll need to grow weed easy at home.

A Grow Tent

A grow tent provides an non-intrusive solution for those growing cannabis at home. Many people live in rented accommodation, and grow tents allow you to operate in a closed-off section where pets and kids won’t have access. These offer precise temperature and humidity control, and can also be vented to keep that potent aroma from filling the house.

For a 6-plant grow, you’ll require a grow tent of at least 4ft x 2ft. These come in at around $100-$150. The tents also provide a reusable, highly efficient solution with reduced light loss for optimal growing conditions.

Lighting Solutions for Cannabis Growing at Home

A good lighting setup is of paramount importance when growing cannabis. LED lights are best as they consume less power and radiate less heat. For a small grow involving 6 plants, a lighting solution will come to approximately $300. These can be mounted to the roof of your grow tent with cords that allow varying heights. The manufacturer will specify heights, but a good rule is to start these lights at 4 feet above the plants and adjust as the plants grow.

A Fan and Carbon Filter Ventilation System

When growing cannabis indoors, the last thing you want in your grow room is a stagnant pocket of hot air. A fan is an essential piece of equipment that has the advantage of keeping pests and mold at bay. A carbon filter helps remove the odor, which is essential if you’re growing in a closed environment. You’ll need to ensure that your tent is well ventilated and that a continuous flow of air is allowed to enter. The cost of a fan and carbon filter ventilation system for a 6 plant grow will start at around $100.

Temperature and Humidity Sensors

Cannabis requires strict temperature and humidity control. Exact values vary depending on the point in the grow cycle, but you’ll want to constantly monitor both parameters closely. A simple digital sensor should cost no more than $10.

Pots for Growing Cannabis

Pot sizes of between 3 and 5 gallons are ideal. These encourage optimal root development when compared to larger options. Cloth or plastic will do, and a set of 6 pots should cost around $20.

Optimal Soil for Growing Cannabis

Soil is an incredibly complex topic in and of itself, but a good soil blend is essential if you want your cannabis plants to thrive. For beginners, soil is recommended over a hydroponic substrate, which is much more challenging to grow in and more expensive to set up.

If you are growing auto-flowering varieties of cannabis (recommended for beginners) then it’s a good idea to use a 50/50 mix of coco coir, which is made from coconut husks and helps with water retention, and a peat-based soil with perlite, which helps with drainage. Many home growers end up buying their own ready-made blends. Many competing options exist online, so do a bit of research first. Be prepared to spend $150 for a premium blend.

Nutrients, fertilizer, and feed for cannabis

You will have to give your cannabis plants all the nutrients they need if you want to maximize your harvest. The sky truly is the limit when it comes to tweaking the optimal nourishment for your plants, but if you’re a beginner, it’s best to take a simple, straightforward approach. The ‘2 Part Dual Fuel Kit’ is usually sufficient to get you up and running. It comes in at $60. The set contains several bottles containing top additives to help ensure your cannabis plants reach their potential with fertilizer mixes, flavor and aroma enhancers, and a carbohydrate.

However, for those more serious growers, you can take a more tailored approach. Many experienced cannabis growers trust the General Hydroponics line of nutrients, but this requires an initial investment of approximately $200.

Useful Additional Extras to Grow Weed Easy

While the aforementioned will provide you with all the essentials, there are some optional extras that’ll help prevent further problems.

Bug Strips

Any cannabis grower who has previously dealt with pest infestation knows all about how difficult it can be to recover from one. Not only must you factor in the extra time spent attempting to get things under control, but your plants will not reach their full potential due to the energy they’ve invested in protecting themselves.

By using bug strips right from the get-go, you give yourself the opportunity to act preventatively before an outbreak occurs. They are a cheap solution to a potentially disastrous outcome.

LED UV Protective Glasses

Starting at $20 and specially designed for grow rooms, these glasses protect your eyes from harmful wavelengths and deliver optimal color balance, allowing you to work safely in your tent and treat your plants.

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

Effects of Poor Humidity Management
Humidity Basics
Seedling & Vegetative Stage
Flowering Stage
Drying Buds
Temperature & Humidity (VPD)
Too Cold?
Too Hot?
How to Control Humidity in the Grow Room
Step 1: Get a Humidity & Temperature Monitor
Step 2: Refer to Humidity Chart
Step 3: Correct Levels That Are Too High or Too Low (explained)

Questions about buying cannabis seeds online?

One Grower’s Story – Dealing with Low Humidity in Denver

by Nebula Haze & Sirius Fourside

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

To grow the stickiest, most potent buds, your cannabis will demand attention to its many

View New Pages & Updates on

One of these needs of the growing cannabis plant that is commonly overlooked is humidity.
Believe it or not, humidity is actually very important to your plant, and it will help determine its
resilience against mold/mildew in addition to how much your plants need to drink.
Luckily, there isn’t much to learn, so you can be the master of humidity in your grow with very
little effort!
Today, we will give you the information to master humidity and thus, give your plants a boost
in production!

Why Humidity Matters To YOU
In all stages of cannabis growth your plants will have a constant need to intake water, and the
amount of water they need fluctuates with the humidity in your grow room. When the humidity
is high, cannabis plants use their leaves to absorb moisture from the air which causes them to
drink less water from their roots. Conversely, when the humidity is low, they will pull more
water in through their roots since less is available in the air.
Since humidity changes how much water your plants drink,
being in control of humidity gives you increased control over
nutrient intake.
But controlling humidity isn’t just about prevention. having the
right humidity encourages strong, healthy, leafy plants with
vigorous growth. In fact, growing with DWC (Deep Water
Culture) / Bubbleponics during vegetation with the correct
humidity can actually turn into a struggle to tame out-of-control
plant growth!
Additionally, after your plants start making buds in the
flowering stage and get close to harvest, you might be able
to manipulate the humidity to get your plants to produce more resin (trichomes/glitter
which contain THC and other cannabinoids) while preventing plants from being attacked by
mold. High humidity can sometimes cause mold – a grower’s worst nightmare for those fat,
dense main colas.

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

Effects of Poor Humidity Management
We’re not out to scare you, but you should know what happens to a grow room with poor
humidity management. We’ve experienced every single one of these effects, so don’t feel bad
if you’re just learning this stuff!
White Powdery Mildew
White Powdery Mildew is a fungus that will shows up high humidity environments.
This can be tricky since young cannabis plants flourish in humid environments.
Luckily, you can stave off WPM by making sure there is proper airflow in your grow
area; a small oscillating fan on low works wonders.

Bud Mold or Rot
Bud rot or mold is – in my opinion – one of the worst pains a grower can experience
as a result of poor humidity management. Imagine harvesting a huge, dense main
cola from your plant only to see the insides are totally white or brown with mold. Buds
in this condition are unusable and 100% should be thrown away.

Nutrient Problems
Humidity is a factor that partly determines how much your plants will drink. If the air is
dry, your plants will tend to drink more. If they’re already drinking a lot due to high

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

temperatures, low humidity can cause them to drink a lot of water and uptake toohigh levels of nutrients. If your plant takes in more nutrients than the plant can use,
the leaves will begin to show yellow or burnt tips, which is the result of nutrient burn.
Sometimes too-low humidity can cause other apparent nutrient problems.

Slowed Growth
Cannabis plants love higher humidity when they’re young, and lower humidity when
they’re mature. To be frank, if they’re not getting these conditions, they’re not
growing nearly as fast or healthy as they could be.

Humidity Basics
Okay, you know why you need to manage humidity when growing cannabis, but you may not
know what humidity you are aiming for.
Humidity is actually a measure of how much water vapor is being “held” in the air. There are
different ways to measure humidity, including absolute, specific, or relative humidity.
Most growers are talking about Relative Humidity or RH when they talk about humidity in the
grow room.
Relative humidity measures how much water is in their air compared to the maximum amount
of water that can be held in the air at that temperature.
Here’s a quick reference for the major stages of the cannabis life cycle in regards to the
relative humidity you are aiming for:
Seedlings & Vegetative Plants
Flowering Stage

Optimal Humidity is 70-80% RH

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

Clones need time to develop a root system to intake water.
Young clones are solely dependent on getting water through
their leaves from the air. This is only possible with high
Maintaining high levels of humidity will dramatically increase
the chances of clones rooting successfully, and will increase
young clone growth.
This is why many growers use a humidity dome for new
Here’s a step-by-step picture guide to cloning cannabis:

Young plants (seedling to end of vegetative stage)
Optimal Humidity is 40-70% RH

Young cannabis plants in the vegetative stage grow a
lot of leaf mass in a great growing environment, and
plant can sometimes grow foliage at a faster pace than
the roots.
The roots aren’t the only way your plant gets water.
Leaves can actually pull water vapor directly out of the
air, and higher humidity in the air allows the leaves to
get more water to the plant if needed. Until your plant has fully developed roots, higher levels
of humidity in the air will tend to promote faster growth.
That’s why younger plants tend to grow better with high relative humidity, especially in a
comfortably warm environment that mimics springtime or summer.
Warning Signs:
The RH is too high if the plants are forming wet spots on their leaves
If the RH drops below 25%, the dry air will tend to limit growth and cause nutrient
problems to appear on leaves, especially for young seedlings

Humidity for flowering plants
Optimal Humidity is 40-50% RH (or less)

Ideally, the relative humidity of your grow room should be lowered to around 40-50% at the
beginning of the flowering stage. As plants approach harvest, some growers lower humidity
down to 30% or even less to force cannabis buds to produce more resin.
By the beginning of the flowering stage, your cannabis plants have created a large root system

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

to fulfill their water needs. They will still be able to take in water through their leaves, but a
relatively lower humidity than the vegetative stage helps prevent molds or mildews from
Mold is especially dangerous in the flowering stage because it can form on or inside your buds
or colas, without you knowing. If you find that you have mold growing in any of your buds, or
buds are rotting from the inside, you should immediately throw all contaminated buds away.
Bud rot can ruin entire harvests, so if one bud is infected, thoroughly search your grow room
for more. If you can’t lower the humidity, cut your losses and harvest now, to avoid any other
buds getting bud rot.
Even if the humidity is low, it is still important to have air moving over and around your plants.
Small fans blowing over and under the plant canopy will help keep air moving so that wet
spots don’t form around any parts of the plant.
Extra resin production
During the last 2-3 weeks before harvest, some growers will use a dehumidifier to
drop the humidity of their grow area as low as possible. This not only prevents bud
rot during the last few weeks, the dramatic drop in humidity may stress the plant in
just the right way to increase resin production, as a result, you harvest extra-potent
buds with more sparkly trichomes. While this technique has not yet been proven to
increase resin, many growers swear by it.

Humidity for drying buds (early stage cure)
Optimal Humidity is 55% RH (for beginners)

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

Keeping the humidity around the 45% – 55% range will allow
your buds to dry, but keep them from drying too quickly.
This range is also optimal for preventing mold, so it doesn’t
get any better for drying if you’re a beginner!
As an advanced drying and curing technique, some growers
like to keep the humidity a little higher so buds dry slower
(which tend to increase the quality of your cured buds). The
reason this is considered advanced is higher humidity
during drying must be done with care to prevent mold!
It’s important you have good air circulation in the drying area, but it’s recommnded that no air
is being blown directly over the buds. More information in the link below!
Learn how to dry and cure buds for professional results every time (no more guesswork!):

Temperature and How It Relates to Humidity
Temperature and relative humidity are closely related to each other.
Relative humidity is measuring how much water is “being held” in the
air compared to the maximum amount of water that can be held at
that temperature.
Warm air can “hold onto” more water than cool air. Plants will tend to
thrive at different relative humidities depending on the temperature
of the air. Once the air becomes too saturated with water, it will tend
to form dew or films of water over leaves, which leads to mold.
For those interested in learning more about the science behind this, there is a term used by
greenhouse growers known at VPD, or Vapour Pressure Deficit, that roughly measures the
temperature and relative humidity.
According to Wikipedia: “the ideal range for VPD in a greenhouse is from 0.45 kPa to 1.25
kPa, ideally sitting at around 0.85 kPa. As a general rule, most plants grow well at VPDs of
between 0.8 to 0.95 kPa.”
When growing plants, temperature is just as important as the Relative Humidity (RH) of the air,
if not even more so! You need to control both temperature and RH at the same time to get the
best results when growing cannabis.
If the air is too hot and dry (high VPD), plants will tend to have stretched growth.
If the air is too cool and humid (low VPD), plants are more prone to problems with
mold or fungus.
Here’s what that means to you, the grower:
Cannabis likes a comfortable room temperature, or a little warmer – not too dry, not too humid.
For most growers, that is all you need to worry about.
If your grow room feels warm or cold, humid or dry, that is a sign that you may want to look

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

into changing the temperature and/or humidity of your grow area.
Generally, cannabis plants prefer temperatures in the 70-80 °F (21-27 °C) range during the
day when lights are on. When lights are off (or at night), cannabis plants are happy with
slightly cooler temps.
What if it gets too cold?
Colder temps will tend to slow down growth. Temps lower than 60°F (15°C) tend to upset plant
growth and freezing temperatures will shock or even kill a cannabis plant.
Can cannabis stand higher temps? What if my grow room is too hot?
Please note that too-high temps in the flowering stage will not only slow down bud growth and
cause fluffier buds, but it will also tend to reduce the potency of your buds – keeping the grow
room temperature under control is important in the flowering stage!
Advanced Tips
With bright grow lights (such as 600W HPS and larger), cannabis plants can thrive at
temps up to 85°F (30°C) even with no CO2 enrichment, as long as there is low
relative humidity and plenty of air movement.
Cannabis plants can thrive at higher temperatures, up to an ultimate max of about
95°F (35°C), in an environment with low humidity, extremely bright grow lights and
enriched CO2 (above 1500 PPM) – this is not your average grow!
Cannabis prefers slightly cooler temperature at night (warmer night temperatures will
tend to slow down growth – so you can use this knowledge and raise night
temperatures to slow down stretching plants that are growing too tall too quickly)

How to Control Humidity in the Grow Room

Step 1: Get a Humidity & Temperature Monitor to see if you need to adjust anything

I like the Ambient Weather WS-07 Wireless Thermo-Hygrometer because it lets you remotely
check the temperature and humidity from another room (don’t forget to get 6 AAA batteries).

Step 2: Refer to Chart
Ideal temps are 70-80 °F (21-27 °C) during the day (lights on) and slightly cooler at night
(lights off).
Refer to the following chart to determine if relative humidity is in the ideal relative humidity

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

Young plants (seedling to end of vegetation)
40-70% RH (younger plants prefer higher humidity – if you see wet spots
forming on the leaves, humidity is too high or you need to increase air
Flowering plants (making buds)
40-50% or less RH (a little less humidity helps protect plants from mold during the last few weeks of flowering, a lower RH can possibly
increase resin production as buds approach harvest)

Step 3: Correct humidity and/or temperature that is too high or too low
Many indoor growers tend to deal with too much heat and high temperatures – this is because
grow lights can get very hot, and cannabis grows are often confined to very tight spaces due to
stealth or privacy concerns.
The relative humidity of your grow area depends mostly on where you live, and how you’ve
chosen to construct your grow area. Many growers struggle with lowering their humidity,
because the mass of leaves and vegetation in a small grow area tends to cause the humidity
to go up.
Here’s how you can correct common cannabis problems with heat and/or humidity.
Humidity is too high – How to lower Humidity
Humidity is too low – How to increase humidity
Too hot – How to lower temperature safely
Too cold – How to safely warm things up

Humidity is too high – how to lower humidity
Dehumidifier – will pull moisture from the air in a small area like a grow room or tent
– a good one can be hooked directly to a drain for very humid areas like the UK and
other humid parts of the world, otherwise dehumidifiers will automatically shut off
when full and you will have to manually remove the water that it collects from the air.

Increase ventilation (add a more powerful exhaust fan or otherwise improve your
exhaust system) – this increases the total amount of airflow in the grow area. This

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

strategy will only work to lower humidity if the intake air has a lower RH than the air
in the grow room.
Advanced: If you do get a high-powered exhaust fan to lower humidity, you may want
to consider getting atmospheric controller with a humidity setting to automatically
adjust the fan speed to achieve the humidity you want.

Avoid over-watering plants – soggy soil (or leaving extra water in plant trays sitting
in the grow area) will tend to raise the humidity of the grow room
Consider slight defoliation – very leafy plants will tend to raise the humidity of the
grow room, especially when there isn’t good ventilation or air flow.
Air Conditioner (some are portable, some ACs fit in your window) – tends to lower
humidity (in addition to cooling the air)

Humidity is too low – how to increase humidity
Humidifier – will add additional moisture to the air, I like the evaporative type of
humidifier because it also works to cool down temps slightly. Make sure you get a
humidifier with a large holding tank (holds at least 6 gallons of water at a time).
Those "one-room" humdifiers with a 1.5 gallon tank often need to be refilled several
times a day.

This humidifier is an evaporative swamp cooler that holds 6 gallons of water at a time – great

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

for hot, dry climates.
Swamp cooler – will cool down air while increasing the relative humidity; works best
when humidity is too low and temperature is too high. Read how one user used a
swamp cooler to control his humidity.

Temperature is too high (too hot) – how to lower temperature & cool things
Increase ventilation (add a more powerful exhaust fan) – this increases the total
amount of airflow in the grow area. This strategy will only work to lower temperature
if the intake air has a lower temperature than the air in the grow room (if the air
outside is hot, too, adding more ventilation won’t do much to lower the temperature)

Air Conditioner (some are portable, some ACs fit in your window) – in addition to
cooling the air, an AC will also tend to lower the relative humidity of the air

Light Schedule – Consider having your lights turn on during the cooler parts of the
day (for example some growers have their lights on at night, and keep lights off
during the hottest parts of the day)

Temperature is too low (too cold) – how to raise temperature & heat things up
Insulation – Consider insulating your grow box or grow tent with something that
holds in the heat
Bigger grow light – Get a bigger (and hotter) grow light, such as a 600W or 1000W
HID grow light
Heating mat – placed under plants

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

Check It Out!
Monitor temperature & humidity in your grow room!

I like the Ambient Weather WS-07 Wireless Thermo-Hygrometer because it lets you remotely
check the temperature and humidity from another room (don’t forget to get 6 AAA batteries).
Monitor temperature & humidity even while you’re away!
Here’s a really simple solution that lets you check your temperature and humidity of your grow
room in real-time, even if you’re not at home!
1. Buy an indoor/outdoor temperature+humidity sensor and display, such as the model
listed above
2. Put the "outdoor" module in your grow tent or box.
3. Put the "indoor" display in front of a webcam (you may have one built into your laptop,
or buy a cheap and easy-to-use one like the Logitech HD Webcam C310)
4. Install LogMeIn (it’s free)
5. You can now log into your computer from any other computer, open the program for the
webcam, and see what your grow room stats are in real-time.
Thanks to Tokiehardo for this awesome tip!

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

Too Hot, Too Dry – Humidity Story from a Grower in Denver
by thatsnotmybike
I’m preparing things for my first grow and trying to make sure that I plan everything ‘right’ and
I’m not surprised by too many things, and hopefully none too late to fix.
Humidity has me confused. I’ve seen sources saying the greater the humidity the better, some
that say humidity makes no difference as long as the plant is hydrated, and some claiming
nothing will grow if you’re not nailed at 45%.
The ambient humidity near Denver is pretty low – the room I plan to grow in sits at 20% on
average. Is this too low for my plants to be happy?
This humidity is too low for healthy growth of cannabis plants. This grower decied to build
something known as a swamp cooler:
It moistens the air while keeping the temperature down, which can also be a problem in
Update from the grower: For anyone stumbling onto this in the future, the swamp cooler in the
link above is friggin awesome. I have it connected to my intake ducting and it’s keeping the
cabinet at 73F with 80F outside temps! I cannot downplay how great it works, but I
recommend creating a way bigger reservoir, so you don’t have to refill it every 6-8 hours.

Cannabis: Controlling Humidity Indoors | Grow Weed Easy

View current grow by thatsnotmybike here:

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