Soil is the most traditional medium for growing marijuana indoors, as well as the most forgiving, making it a good choice for first-time growers. Any high-quality potting soil will work, as long as it doesn’t contain artificial extended release fertilizer—like Miracle Gro—which is unsuitable for growing good cannabis.
Light emitting diode (LED) technology has been around for a while, and they are getting more efficient all the time. The main drawback to LED grow lights is their cost: well-designed fixtures can cost 10 times what a comparable HID setup would.
Many growers will start plants in a one-gallon pot and then transplant up to a bigger pot as plants get bigger. A lot of growers will transplant once, from a one-gallon to a five-gallon pot, and harvest from there. If your plants get bigger, they may need a seven- or ten-gallon pot.
A lot of people these days buy grow tents for their weed, but they aren’t necessary. You can grow in a closet, tent, cabinet, spare room, or a corner in an unfinished basement. Just keep in mind that you’ll need to tailor your equipment (and plants) to fit the space.
Although it’s more resource-intensive than growing outdoors and you will likely have to spend more money on utilities to power equipment, you can control every aspect of your grow environment and what you put in your plant, allowing you to dial in your setup to grow some primo weed.
Finding the right soil for cannabis.
Before watering, check the pH of your water and add pH Up or Down if needed.
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.
These come in different shapes and sizes and are a great way to get rid of odor in an indoor weed grow. Also known as “carbon scrubbers” for their ability to get contaminants out of the air, these employ activated and highly ionized carbon to attract particulates responsible for carrying odor, such as dust, hair, mold spores, and volatile organic compounds, and traps them in a filter.
For a root system to develop and thrive, they will need the following:
As much fun as growing marijuana indoors is, having a home that perpetually smells like fresh weed can be a serious inconvenience, if not to you than possibly your neighbors. Although weed odor from a small indoor grow in a closet is much easier to manage than a large grow with several flowering plants, both can produce pesky odors that will permeate an entire home if left unattended.
Inevitably, there will be fluctuations of temperature and humidity in your cannabis garden. These fluctuations can occur both throughout a grow space as well as within pockets inside a given room. They can also occur at different points within a given day or throughout a season as conditions change in the environment outside your grow space.
The flowering stage will always take about eight weeks—some strains take seven, some nine, some even more, it depends on the strain.
Standard plastic containers are a popular option for growers operating on a budget. These pots are inexpensive and provide the essentials for your plants.
There are many different media to choose from, including good ol’ fashioned pots full of soil, rockwool cubes, a hydroponic tray, and more.
Fluorescent grow lights.
Odor becomes much more difficult to manage in the final six weeks of a marijuana plant’s life, when trichomes and terpene production ramps up. You can also get odor-absorbing gels, which replace weed smells with other scents. Keep in mind that odor gels don’t eliminate odors, but simply mask them.
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.
The growth stages of marijuana can be broken down into four primary stages from seed to harvest:
When growing weed indoors, you’ll likely have to add nutrients to your plants. You won’t need to add nutrients every time you water, but get on a schedule where you water every other time, or two on, one off.
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.
Different lights produce different colors of light. Here’s a brief rundown of the most popular types of cannabis grow lights used for indoor growing.
What to look for in a pot.
Check out our buying guide on indoor lights for more info.
Good soil for cannabis relies on a healthy population of mycorrhizae and soil bacteria to facilitate the conversion of organic matter into nutrients that a plant can use. Alternately, you can use a regular soil mix and then supplement your plants with liquid nutrients.
Drainage is key, as cannabis plants can get waterlogged and develop root rot . If you repurpose containers, be sure they have holes in the bottoms and set them in trays.
Carbon filters usually work best when positioned at the highest point in your grow space, where the most heat accumulates.
What type of container you use will depend on the grow medium, the system, and the size of your plants.
Below is a list of things to consider and equipment you will need to purchase to get started growing marijuana indoors.
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.
Looking for a suggestion? One of the simplest (yet inexpensive) nutrient systems that work extremely well for beginning cannabis growers is Dyna-Gro (Grow, Bloom)
The flowering stage is where your plant goes through “puberty” and basically reveals whether they are a boy or a girl.
Paper Towel Method:
Step 4B: Nutrients, continued: The Importance of Root pH.
There are certain types of grows (such as when growing cannabis in organic composted super soil) where you don’t need to test your pH unless you run into problems. This is because with a properly composted super soil, you actually have a microbial colony living in the soil that will take care of the pH and hand-deliver the nutrients to the roots of your plants for you. However , this is a rare exception to the pH testing rule, and almost all growers need to regularly test and maintain pH for a successful grow. If you’re not growing in super soil that you have amended and composted (or purchased) yourself, testing and maintaining pH is a MUST.
Soilless & Hydroponic growers – If you are growing in any medium besides soil, like a soilless mix or directly in water, you will want to get cannabis nutrients specifically made for hydroponics. Some nutrients are even more specific; for example, Canna Coco is formulated to work best for growing weed in Coco Coir. For hydroponic grows, I highly recommend the General Hydroponics Nutrient Trio – here’s the cannabis-friendly GH trio nutrient schedule I use with my cannabis plants.
As cannabis growers, we’re only looking for females as female plants are the only ones that make buds. Male plants just make pollen sacs (balls) that cannot be used for smoking.
Metal Halide (MH) & High-Pressure Sodium (HPS)
Getting the pH exactly right isn’t nearly as important as checking regularly and making sure it stays within these ranges.
I’ve heard many people recommend against growing cannabis hydroponically for your first time because it’s “too complicated,” yet I’ve seen growers succeed at every grow type even on their very first grow. If you really want to grow hydroponically, I recommend you don’t waste your time doing something else first. If you’re passionate about hydroponic growing and do your research before you get started, there’s no reason you won’t be able to do incredibly well your first time. Read our bubbleponics tutorial to see how GrowWeedEasy.com co-creator Sirius got started growing cannabis with top-fed DWC on his very first grow.
You have more control over everything in an indoor growing environment, which means that indoor growers can consistently produce dank buds. However, this dank weed-growing power comes with more responsibility. As an indoor grower, your plants are 100% reliant on you your care if they are to survive. If you don’t provide everything your plants need, they will die.
Step 7: Vegetative Stage – Grow Your Plant Big and Strong.
Special products like “Boveda 62% Humidipaks” will make curing a lot easier, as they will naturally regulate the humidity in your jars.
Indoor grows tend to be shorter than outdoor grows since you have more control over when the plant starts budding. Auto-flowering grows also tend to be very short. But with shorter grows, you also tend to get smaller yields. Certain strains and certain outdoor grows can take up to 7 months or more.
Unless you know someone who has experience growing with a particular model of LED light, you’ll often spend a grow or two trying to get your light model “dialed in” so you know how far away to keep the lights from your plants for best results.
LED grow lights work great for growing cannabis and some companies have been refining their models for years (the combination of parts is almost like a company’s recipe). Each LED model is different and needs to be kept a different distance away from your plants. It can sometimes be hard to find any “standard” advice about growing with LEDs, yet these days there are quite a few brands which are well-tested and trusted by cannabis growers and these brands tend to have good support for questions. When in doubt, it’s always a good idea to just ask the manufacturer about how far away the lights should be kept, as that’s where new growers are most likely to mess up.
If you planted a cannabis seed today, when is the soonest you could be actually smoking your harvest? Probably about 9 weeks with a quick-finishing autoflowering strain.
Step 6: How to Germinate Cannabis Seeds.
LEC (Light Emitting Ceramic) is a brand name for a type of light (CMH – Ceramic Metal Halide) that has existed for quite a while. This type of light has come back into vogue after some rebranding, partly because it has some very positive traits for growing cannabis compared to HPS lighting. For one, LECs have a more natural color that makes it easier to care for and diagnose plant problems. Plus, it’s a lot better for security to have a light that doesn’t scream “WEED GROWING HERE!” like the unearthly yellow hue of an HPS. They produce significant levels of UV light, which can possibly increase trichome production. Additionally, they don’t seem to emit EMI (Electro-Magnetic Interference) as much as their noisy HPS cousins which means you’re less likely to have a HAM radio enthusiast accidentally tracking down your grow. The plants grew surprisingly fast under a 315 LEC and we were impressed by the yields we achieved on our first grow.
LEDs are much more powerful than CFLs or any other fluorescent lighting. They are top-tier grow lights on par with HID lighting (HPS, LEC) when it comes to how much bud they can produce. They’re visually attractive and tend to be more appealing to growers because they’re not as ‘old-fashioned’ (though they tend to cost more). In fact, LEDs are the only grow lights that have seen major technological research and development in the past 10 years.
It’s important to pay close attention to your cannabis plants during the flowering stage. This is because in this stage your plant is much more likely to suffer from nutrient problems as they’re focusing all their energy on growing buds.
At this stage, you can’t tell if one of your cannabis plants is going to be a boy or a girl yet. Wait, why do I care if my plant is a boy or a girl?
For those growers lucky enough to know other cannabis growers in real life, getting plants is usually pretty simple. Many cannabis collectives and dispensaries will happily sell you clones though they tend to be a little less liberal when it comes to selling seeds. A great advantage of purchasing clones or seeds from a trusted source is that you know you can trust the genetics you are receiving.
Another popular way to germinate seeds is via the paper towel method.
If you don’t have access to marijuana seeds or clones from a dispensary or friend, you’ll need to get some cannabis seeds mailed to you. Don’t have them mailed to the same place you plan to grow if you’re not growing legally. Don’t just learn how to grow weed, learn how to be discreet and not brag or bring attention to yourself.
Use a loupe or a strong magnifying scope to take a very close look at the trichomes; the tiny glandular stalk and head sometimes referred to as “crystals”. Up close, they resemble little glass mushrooms with a stem that forms a bulbous round clear top. Inside that gland head resides the psychoactive compounds (THC, CBD etc). Harvest when the majority of the gland heads begin to go cloudy white and before they’ve gone completely amber. Harvest when they’re mostly amber if you desire a more lethargic stone.
A simple loose and airy soil mix in 3-5 gallon buckets are great for beginners and much more forgiving than any hydroponic system. Be sure to cut holes in the bottom of the buckets and use saucers under them to catch any overflow. You’ll need to purchase nutrients to feed to your plants as they grow and a watering can as well.
How To Grow Weed.
You’ll also need an exhaust fan and activated carbon filter to reduce heat and eliminate odors. Be sure to get one that’s rated for your tent’s size with the proper ducting size. A clip-on circulating fan will keep air moving and stop it from being stagnant. A thermometer/hygrometer is also a must for keeping track of temperature and humidity.
Post-harvest, you will trim and hang up your buds to dry. This process should take about a week or two depending on the humidity and heat in your area. It’s always best to keep this process slower than 3-4 days in order to ensure you aren’t locking in that “green” chlorophyll taste. Add a humidifier to your drying room if you think your nuggets are drying out too quickly. Never leave a fan blowing directly onto your drying colas but make sure air is circulating to avoid mold and bud-rot.
As with any garden, when growing marijuana, pests are a constant concern. For anyone learning how to grow weed, it is important to become well-versed in pest management. The last thing you want is for the marijuana crop that you have been working so hard on to be eaten away by a pest infestation. This video teaches you how to ward away pests from your precious plants with integrated pest management, stopping an infestation before it can even happen. Just a few simple steps can mean the difference between victory and defeat.
Anytime space is limited for growing, some basic rules apply: Since square footage is at a premium, plans must take full advantage of each available inch. This means choosing between growing indica-dominant strains such as Hashplant, Afghani #1 or planning on using drastic trellising and training techniques if growing out sativas such as Super Silver Haze, Jack Herer or Kali Mist.
After you’ve determined that your buds are sufficiently dried you’re ready to jar them up for the cure. The stems should snap instead of bending and the outside of the flowers should feel bone dry to the touch. The truth is there is still plenty of water stuck in the bud and the curing process will slowly “sweat” out the remaining liquid.
The first thing you’ll need is a place to grow. I recommend getting yourself a decent grow tent. They’re cheap, made to grow inside of and can be put up and taken down quickly by one person. Some tents come with packages that include all kind of complicated hydroponic equipment. Your best bet is to purchase only what you need inside the tent and to learn how to grow weed without the expensive plastic. Some even have separate chambers for vegetative growth and cloning, making them perfect for people living in one-bedroom apartments or studios with limited room to grow.
Tips on How to Grow Weed: The Smart Pot.
Attention to detail is essential if you are a beginner who is trying to learn how to grow weed. Even the most inconsequential detail could be the difference between a healthy plant and a dud. In this video, learn about the best type of container to use to grow your marijuana plant. We recommend a “smart pot,” which is a container that is made of breathable fabric that allows the roots of your plant to grow much larger. Larger roots mean a larger marijuana plant, which means a more bountiful weed yield when the time comes.
When pruning, start early and often. Cut or pinch branches just above the node where two new shoots will emerge. If you stay on top of this process, you’ll have plants that look like bonsai bushes, with plenty of bud sites but not a lot of stretching out and big gaps between nodes. This is the efficient way to get bigger yields out of small spaces but your vegetating time will increase so factor that into your schedule.
A hydroponic garden, also known as a “hydro” setup, is a very popular implementation to grow high-quality weed. In this video, an expert takes you through the ins and outs of a typical hydro setup, allowing you to see what it takes to successfully implement your own hydro setup at home. For those who are beginners just learning how to grow weed, a hydroponic garden may seem way too complicated to even consider. However, with some assistance from the experts at High Times , you can easily set up a hydro system that will give you an epic yield!
When you’re ready to begin the flowering stage, switch your timer to a 12 hour on/12 hour off light cycle. Be sure never to interrupt the 12-hour dark period with any light. This confuses your plant and can cause serious problems.
Pruning For Higher Yield.
A key part of learning how to grow weed is mastering drying and curing techniques. You do not want marijuana to dry too quickly or too slowly, as the ideal drying time for a healthy and flavorful marijuana plant is 10 to 14 days. In this video, you will learn the perfect temperature and humidity to dry and cure weed, as well as pro tips that will teach you how to grow weed and trim your plants like an experienced veteran, leaving you with a grade-A product.
Change your feeding regimen to one suited for flowering. Plant nutrients generally come in vegetative or flowering formulations so switch over to a “blooming” solution. Depending on the flowering time of your strain, determine when you have two weeks or so left and begin the flushing process. If you’re growing a 60-day flowering strain, start to flush your grow medium with only plain water around day 46.
Looking for the basics of how to grow marijuana? Here are the tools and information on how to grow weed affordably and effectively. All you need is a small discreet space and a little bit of a budget to get started on your indoor pot production.
First, you’ll need a growlight. I like HID (High-Intensity Discharge) lighting – HPS (High-Pressure Sodium) or MH (Metal Halide) systems with ballasts, bulbs and reflectors. If heat from these lights will be an issue, there are also LED (Light-Emitting Diode) and CFL (Compact Fluorescent) systems you can employ. Be sure to get a light that covers your tent’s footprint and invest in a decent timer to control when your light turns on and off.
Avoid overfeeding and overwatering your plants at all costs. Err on the side of caution as it’s always easier to add more nutrients or water than it is to take them away. Marijuana roots prefer a wet/dry cycle so lift up your buckets and you’ll get a better idea for if they need watering or not by the weight. The first sign of overfed plants is burnt leaf tips. The first rule of how to grow weed is to learn to stay off of its way sometimes.