things u need to grow weed indoors

Examine the tops and undersides of leaves for pests or discoloration—spider mites live on the underside of leaves—as well as stalks and branches. Also, check the soil for pests.

The first step in odor control is making sure temperature and humidity are under control in your grow space—high temperature and humidity will perpetuate odors.

It can be tricky getting the right balance of temperature and humidity because they affect each other—turning up your dehumidifier will lower the humidity of your grow space, but it will also increase the temperature of the area. This in turn may require you to turn on an AC unit—everything’s connected!

But the benefits are great: LEDs last much longer, use far less electricity, create less heat, and the best designs generate a fuller spectrum of light, which can get bigger yields and better quality.

You’ll likely yield about the same amount of weed in both cases, but more harvests mean you’ll have fresh weed to smoke more often and have more opportunities to grow different strains. But more harvests also means more work in cleaning up the space between harvests, trimming, etc.

Check for pests, mold, or nutrient deficiencies.

Plants need 18 hours of light a day when in the vegetative stage and 12 hours a day when flowering. The reduction in light from 18 to 12 hours a day is what triggers the flowering cycle—when weed plants start to grow buds.

You can make this yourself by combining worm castings, bat guano, and other components with a good soil and letting it sit for a few weeks, or it can be purchased pre-made from a local nursery or grow shop.

Here are some ways to mitigate odor when growing weed indoors.

You’ll also want to take this time to check over your weed plants for pests, mold, or nutrient deficiencies.

If your space is too humid, you may need to invest in a dehumidifier—also known as “dehueys.” However, keep in mind that while dehueys will reduce humidity, they typically increase temperature—you may need more fans or an AC when adding a dehumidifier.

Equip yourself with these cheap and easy-to-use tools to take measurements in your indoor cannabis setup:

Below is a list of things to consider and equipment you will need to purchase to get started growing marijuana indoors.

Remember, a common mistake newbie growers make is to overwater plants.

Getting the right climate for your plants can be a delicate balance involving multiple pieces of equipment and also lots of electricity. This is part of what makes growing weed indoors more expensive than growing outdoors.

There should be a comfortable airflow both above and below the canopy, and fans shouldn’t blow air directly onto plants—this can cause wind burn, which makes leaves recede into a claw-like deformation.

Check temperature and humidity levels.

If you can’t afford both MH and HPS bulbs, start with HPS as they deliver more light per watt. Magnetic ballasts are cheaper than digital ballasts, but run hotter, are less efficient, and harder on your bulbs. Digital ballasts are generally a better option, but are more expensive. Beware of cheap digital ballasts, as they are often not well shielded and can create electromagnetic interference that will affect radio and WiFi signals.

These are just some examples of amendments commonly used in different types of soils. Heavily amended soils will have long lists that break down all organic nutrients they contain. Some companies create soils that offer a great structure with base nutrients, but allow you to fill in the gaps as you desire.

Your cannabis wants a safe, healthy place for root development. Without healthy roots, your cannabis will never thrive. Roots are in charge of water retention, nutrient absorption, anchoring the plant, and they also facilitate vegetative growth.

For small spaces or tents, clip-on fans can be attached to structures like walls, corners, or support beams. For larger grow rooms, use medium-sized oscillating fans or big floor models.

Think of all the equipment in your grow space as organs in the body—if one fails, the others will have to work a lot harder for a bit, and then will fail in a matter of time.

Standard plastic containers are a popular option for growers operating on a budget. These pots are inexpensive and provide the essentials for your plants.

Check out our buying guide on indoor lights for more info.

Regulating temperature.

When starting with clones or seedlings, you’ll want to check your plants every day because they’re delicate and sensitive to environmental conditions. You may need to adjust temperature and humidity levels in your indoor grow space at first to hit the sweet spot for your plants.

Unlike outdoor growing, you aren’t tied to the sun and the seasons. You will be providing the entire environment the plants need to grow, including the grow medium—soil, rockwool, etc.—and regulating the amount of water and nutrients they receive, as well as controlling temperature, humidity, and more for them.

For most first-time gardeners, we recommend buying a quality potting soil that will provide your plants with enough nutrients to get them through most of their growth cycle without having to add many amendments or liquid nutrients. This pre-fertilized soil—often referred to as “super-soil”—that can grow cannabis plants from start to finish without any added nutrients if used correctly.

Because the amount of light a plant receives is so important, you’ll need to make your indoor grow space light-tight. Light leaks during dark periods will confuse your plants and can cause them to produce male flowers or revert to a different stage.

Proper air circulation will help maintain temperature and humidity, and also bring down odor. Ideally, air needs to move through a garden every few minutes, and you should create a vent to the outside. Oscillating fans, and intake and exhaust fans can move air through your garden quickly, taking odors out with them.

For a root system to develop and thrive, they will need the following:

The growth stages of marijuana can be broken down into four primary stages from seed to harvest:

If you’re growing in a cold, wet basement, you might have to run a dehumidifier or heater to stabilize the environment. Conversely, if your space is too hot, you might need to add extra fans or an AC to cool the plants down.

Whether you are growing two or 30 plants in your house, grow equipment requires a significant amount of electricity, primarily from your lighting and air conditioning units. Make sure that all electrical equipment is installed by a trained professional to reduce the likelihood of an electrical fire. You don’t need to be an electrician to design an indoor grow, but having a basic understanding of watts, volts, and amps is essential. The equation below can be used to determine whether your property has the minimum amount of power for an indoor garden:

A drain-to-waste system applies fresh nutrient solutions to the grow medium every time the plant is fed. Any nutrients that drain through the medium are then disposed of and not reused.

CO2 can be supplemented into an indoor garden using compressed gas tanks or generators. Using compressed CO2 tanks is the most common method because they’re readily available, easy to set up, and do not add any extra heat to your room the way a CO2 generator does.

The two main options for an indoor garden are soil and hydroponic media. Consider the following:

A recirculating system collects the nutrients and water that are used, replenishes them, but with a smaller amount of fresh nutrients, then reapplies the solution to the plants the next time the plant is fed. A grower will check the solution’s pH before and after adjusting the nutrients.

Odor control.

Soil is a great choice for beginners. It can be much more forgiving and requires less precision when watering and feeding plants. Less-frequent watering and a stable pH foundation can drastically increase the likelihood of a successful first harvest. Soil also contains beneficial microbes and nutrients that help keep plants healthy, though it also creates favorable conditions for pests, mold, and mildew to spread. Working with soil and hand-watering plants can also be messy, but it will allow you to get familiar with the pace in which your plants consume water and nutrients.

Cleanliness in an indoor garden cannot be overstated. Clean your entire grow room before your first grow cycle and after every harvest. The walls, floors, trays, irrigation lines, reservoirs, lights, and fans should be cleaned using a three to five percent (3%-5%) hydrogen peroxide solution, an efficient sterilizing agent that leaves no dangerous or toxic residues behind. Be careful what you bring into your grow room. Pets, dirty clothes, and contaminated clones can introduce unwanted pests and diseases.

Distilled and reverse osmosis water are fairly comparable. It’s the process of distilling that differs from the reverse osmosis process. Distilled water has been boiled to a vapor and cooled back into liquid to filter out contaminants. Reverse osmosis (RO) filters pressure water through a filtration membrane and produce wastewater as a byproduct. They’re generally better than distillers at removing volatile chemicals such as chloramines.

Maintaining the ideal temperature and humidity at all times is crucial to the health of your plants. Some plant varieties prefer hot and humid climates, while others like it cool and dry. Keeping them alive and healthy means controlling the temperature and humidity when the lights are on or off.

Hydroponics is a blanket term for the growing of plants in a nutrient solution, with or without an inert medium to provide physical root support. Media such as fused basalt rock and chalk (known as rockwool), coconut fiber (coco coir), and clay pellets (hydroton) can drastically improve nutrient delivery. With a plant’s roots system exposed, hydroponically grown cannabis can grow faster and more efficiently, requiring less water and fewer nutrients but also requiring monitoring systems to ensure a stable pH.

The first step in creating a proper indoor growing environment is to decide on the medium and irrigation methods you’ll be using to supply your plants with the proper nutrients throughout their growth cycle. The medium is a shelter for your plants’ roots that retains moisture. The irrigation method is the way you deliver nutrients to the plants.

Ultimately, the costs of equipment and recurring utility bills are more expensive than in outdoor and greenhouse settings. However, specialized indoor cultivation equipment allows cultivators to achieve multiple harvests per year and a more reproducible product. If you’re detail-oriented and technologically inclined, indoor gardening is a fun and rewarding pastime, or could even be a full-time job.

AC systems maintain temperature and also dehumidify rooms. Fluctuations in humidity can affect plant health and should be controlled using a dehumidifier or humidifier, depending on conditions.

To set up an indoor garden, you will need equipment to help create a stable environment that mimics the necessary periods of light and darkness to grow plants through the flowering stage. This includes horticultural lighting, fans to recreate a gentle breeze, dehumidifiers to maintain the proper humidity, HVAC (heating, ventilation, and air conditioning), and all the basic supplies that a plant needs to survive, from water to grow media to nutrients.

Image lightbox.

Advanced growers use digital environmental controls to monitor all equipment responsible for maintaining a stable environment (i.e., fans, AC, dehumidifiers, sensors, thermostats, etc.). These environmental controls can be worth the hefty price tag for the peace of mind they provide.

Other common soilless mediums used by hydroponic growers include perlite, vermiculite, coarse sand, and gravel. Advanced growers frequently mix these media in custom quantities to create blends that suit their specific growing style and environment.

Planning, designing, and implementing an indoor garden can seem daunting, but having a firm understanding of the basics goes a long way in helping a new indoor grower get started on the path to a healthy and bountiful harvest.

Water quality is another key aspect of indoor gardening. It’s important to determine water acidity and general mineral content prior to planting. Checking the pH, the acidity or alkalinity of the water, is easy to do with a handheld water quality meter. The same device can be used to check the total mineral or chemical content of your water as well. Knowing these things will help you determine the correct amount of nutrients to feed your plants or if fresh water needs to be introduced.

Feeding your plant is the process of giving it the chemicals and compounds that it needs to grow out its leaves, roots, and ultimately produce the heavy, trichome-covered flower clusters called colas. There are two main types of feeding systems: drain-to-waste and recirculating.

Coco Coir is the fibrous material found on and in coconut shells. Photo by: Gina Coleman/Weedmaps.

Air circulation.

The health of your garden is completely dependent upon the environment you create and the equipment you select. It is easy to buy a new line of nutrients, but much more difficult to replace an undersized air conditioner. Careful planning prior to your grow will go a long way in saving you from expensive mishaps.

Coco Coir is the fibrous material found on and in coconut shells. As a byproduct of the coconut industry, it is favored by growers as a sustainable and renewable medium. Coco coir is an inert medium with a neutral pH that does not provide or maintain any nutrients. These qualities are great for growers who know how to appropriately adjust pH, allowing for quick pH and nutrient changes. There may be a learning curve, but if you’re numerically inclined, it’s not too hard to get a grip on the process. Coco coir can be used either by itself or added to soil or hydroton for improved drainage and growth capability.

Hydroponic media are viable indoor alternatives to soil, but they’re considered more advanced because they bring with them a set of challenges that may prove difficult for beginners. Then again, if going hydroponic is in your plans, it’s best to learn the method from the beginning.

Top feed drain-to-waste systems can be as simple as putting your plants in a soilless medium and watering them from the top of the container, either with a drip system or by hand.

When it comes to cultivating cannabis indoors, you need to be sure to provide your plant with the optimal temperature, humidity, air circulation, CO2, and nutrients.

With lighting, AC, and other environmental controls in place, indoor cannabis plants will require large amounts of fertilizer or nutrients throughout their lifespans. Hydroponic systems lack the base nutrients that occur within soil; that leaves it up to you, the grower, to feed their plants with nutrient concentrations — the exact formula of which depends upon plant variety and phase of cultivation. With hydroponics, salt-based nutrients typically come in the form of a concentrated liquid or dry soluble powder that can be mixed with water.

Always make a list of the power requirements for each piece of equipment and make sure your electrical panels can support the electrical load before you make any big equipment purchases.

In order to know what type of filter you’ll need, you’ll first need to know what inline fan and air filtration system you need. We did this earlier, so let’s skip to it; we know that the 1.2×1.2x2m grow tents need a 468 m3/h fan . Now, all you have to do is find an odor filter with the same sized opening and slightly stronger .

The yields mentioned above are the average numbers obtained under normal growing conditions. Professional growers can definitely harvest more than that, and beginners will most likely harvest less. When it comes to the lamp distance, this can also depend in the growing conditions and your plants’ health . These numbers are simply a guide.

This calculation is done by taking into account the temperature outside your grow room and your lamp strength . In this example, the temperature is 20° and the lighting system is 600w:

The extraction fan may break due to overexertion and your plants may get sick due to breathing old, stale air – you may even have some problems yourself, as the smell will begin to build up and depending on the legality of your situation, the police may get involved. Remember that your odor filter should always be slightly stronger than your extraction fan when it comes to m 3 /h.

Your choice in lighting kit also depends on the amount of money you’re willing to spend, the space you have available and the amount of cannabis that you want to grow, as well as how strong you’d like it to be. Keep in mind that you’ll also be spending more on your electricity bills; a 250w HPS light uses much less than a 600w HPS light .

7- Fans.

In order to grow cannabis indoors , your plants need absolutely no light during their “ night time ” which is why it’s incredibly important to use a grow tent or set up a wardrobe so that no light can get it, or even better, a whole room – but this can be a daunting task.

Proper ventilation is incredibly important for plants to breathe, and an oscillating fan does wonders for rustling your plants’ leaves which induces breathing. If you grow plants with absolutely no fan or any sort of air movement in the room, your plants will grow super weak, as a slight breeze helps them to get stronger and hold up more flowers. Plants grown indoors without a fan are also more susceptible to insect and fungi infestations .

1.2×1.2×2 = 2.88 x 60 = 172.8m 3 . This is the strength that your extraction fan will have to reach to be as effective as possible.

This calculation allows you to keep the temperature in your grow room at a 4C° difference compared to the outdoor temperature. If you’re taking in 20C° air , your grow room will stay at 24C° .

Inline fans are just as important as extraction fans, although if your extractor is strong enough it can create negative pressure which can cause air to come into your grow room without any sort of extra inline fans. This only works with Grow Tents, as they tend to come with passive breathing holes, although if you’re using a room or grow tent you’ll need to sort out air in-take yourself.

Thermos-hygrometers are designed to give real-time readings of the relative humidity in your grow tent or room, as well as the temperature. These devices are vital when it comes to giving your plants the right parameters to grow in – cannabis plants need a specific temperature and relative humidity during each period in order to develop properly.

There’s a longer list with more things that we didn’t mention, as they are usually things that everyone has at home anyway, such as duct tape, clamps, screwdrivers and other bits and bobs .

Before buying anything, the first thing you’ll need to do is figure out where you’re going to set it up . Are you using a full room, a wardrobe in your house, or a grow tent designed for cannabis growing? Depending on your chosen method, you’ll have to spend more or less money.

Shopping lists are highly recommended so that you don’t end up spending more than you need to spend on unnecessary or expensive things. If you take your time to have a look at the current market and options, you can save quite a lot.

When buying an extraction system you’ll need to take down how large your grow room is (in cubic meters) and how strong your grow lamps are. There are other factors that influence the type of extractor you’ll need , and it can be quite hard to find the absolute perfect extraction system. Things like the temperature in your grow room, the temperature outside, the type of lighting and many others can also influence the extractor fan. We’re going to show you a quick solution to figuring out the type of extraction that you need.

3- Indoor extraction system.

In order to calculate the inline fan strength you’ll need to calculate a fourth of your extraction strength. So, if you have a 1.2×1.2x2m grow tent and a 600w lamp, you’ll need a 468m3/h extractor. So, for your inline fan you’ll need to calculate 468/4 which is 117m3/h – this is the type of intake that you’ll need.

We’ve decided to write a full post on the exact materials needed to grow cannabis efficiently and affordably for all of the beginners out there that are a bit overwhelmed.

If you have an extraction system then you’ll also need an inline fan systems need ducting which needs to be durable, flexible and fully opaque , and obviously the same width as your inline fans and other devices such as filters.

You need to calculate the amount of space you’ll need while also keeping in mind the fact that you’ll need to be able to move about and get to your plants and devices. You’ll also need to think about where you want to place the intake and outtake lines for your extraction fan .

When growing cannabis indoors , you absolutely have to use some sort of lighting system potent enough for your plants to believe that they’re outdoors, allowing them to grow and flower perfectly.

Once you know where you’re going to grow and how you’re going to distribute the space , you’re going to need to make a shopping list .

Fans can also help to remove some of the extra heat in your grow room generated by your lighting system. Excess heat near the tips of your plants can cause them to grow thin and wiry and their flowers may end up opening up and losing quite a lot of terpenes.

4- Inline fans.

LEC lighting :

If you’re thinking about setting up your very own indoor cannabis set up but you don’t have much experience, you probably have a lot of questions. What are the materials needed to grow cannabis indoors? How much will it cost? These are two of the most frequently asked questions regarding growing cannabis indoors .

Having a fan in your grow room is an absolute must when it comes to the materials needed to grow cannabis indoors . Two of the biggest factors that fans affect are plant breathing and the heat in the room or tent.

For your inline system to pull as strong as possible, your ducting will need to be as straight as possible . Every bend in your ducting system means that you’ll lose a bit of strength, around 50% , which can reduce your carbon filter and end up stinking up your building as well as being quite bad for your plants , providing them with less fresh air than they need to successfully grow.

If you’re planning on using a grow tent, there’s no need to worry as they’re fully sealed so that no light can get in. If you’re growing in a wardrobe or in a room , you will need to cover every inch of the walls in reflective sheeting for grow rooms , making sure that absolutely no light can get in.

This means that the perfect odor filter for this set up would have a 125mm opening and should be almost 500m3/h . This avoids any mishaps with the filtration system, which can happen if the filter strength is less than the actual extraction itself, causing air buildup. If this were to happen it may be fatal for your plants, especially if you don’t realize that it’s happened.

HPS lighting :

Most thermos-hygrometers also keep a record of the highest and lowest of both readings, so you’ll know if something is wrong when it comes to your plants’ night cycle . This makes it much easier to know exactly what it is that your plants need in as far as their environment.