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Closet Cannabis Growing Guide Summary:
Successful cultivation requires plenty of knowledge, patience and practice. Here at Greenmans Page, we offer support and advice for growers of all experience levels. In this article, we offer a comprehensive guide on closet cannabis growing.

Closet Marijuana Growing Guide

How To Grow Marijuana in a Closet? Find out with out with our free Marijuana Growing in a Closet Guide.

Table of Contents

  • Your place of growing
  • Materials
  • Seeds
  • Stage 1: Starting your seeds
  • Stage 2: Sprouting in soil
  • Stage 3: Jiffy cup to 5-gal bucket
  • Stage 4a: Flowering
  • Stage 4b: Mating (Optional)
  • Stage 5a: Clipping and Drying
  • Stage 5b: Curing (Optional)

Your place of growing

The closet you would grow your marijuana plants would have to be adequate for your plants overall ending size. For most plants this can tend to be anywhere’s from an area of 1’x1′ floor space and 3′ of height to, for much larger growths, 4’x4’x10′ for each plant. But you will most likely need 2.5’x2.5’x6′ for each good healthy plant. You do not need to sprout, grow and mature your plants all in the same spot. Be sure that your plants get plenty of air circulation and that with lights, any heating equipment, and any other sources nearby, that the room will stay at approx. 65-80 degrees Fahrenheit (optimal growth range 73-78). Beware of the smell of your plants drifting into your neighborhood, as it is illegal to cultivate this misunderstood plant. Also, be sure to include outlets for lighting and cooling.

CO2: CO2 is an entirely optional system for helping your plants growth. If there is enough air circulation there should not be any need for such a system, as you could possibly kill the plants with to much. But, if you do choose to use this option, CO2 can be obtained from local gas supply companies. A tank can be obtained for around $100-200 with refills generally costing about $30-50.

Note: This is, of course, true only if you do not live in a smog filled city, where it would be healthier for your plants to be giving them cleaned and/or CO2.


LIGHTS: I feel that the best lights you can use are fluorescents. 25-watt 4-foot tubes are most likely the optimum lights, period. Using normal shop lights for your growth stage and warm “bathroom/kitchen” lights for maturing will be excellent for home personal-use ganja growing. In the seedling stage I prefer to use 75-watt halogen “Plant-Lights” to wake ‘them up. You may want to purchase more expensive lighting, such as HID systems and High-Pressure Sodium lights, if you plan on more than one crop and/or larger crops. But, it is still better to keep a low profile with low energy using lighting and cooling.

SOIL: Your soil should be clean of contaminants and of high quality. Sand is something you should keep away from. Most store bought soils will work fine in this case.

PLANT FOOD: Your plants will need supplemental food other than what is in the soil, so buying supplemental nutrients is a very good idea. For the sprouting stage you do not truly need food unless you want to baby your plants. If you do, the sprouting stage requires a NPK’S ratio of approximately 12-8-12. NPK’S stands for Nitrogen, Phosphorus, and Potassium. These are the basic nutrients required by plants, and most plat foods have other added nutrients, that the makers feel improve plant growth. For your growth stage you will need food with a NPK’S ratio of about 15-5-5 and in the flowering stage of 10-30-10.

CONTAINERS: It is best to transplant as little as possible to ensure female turnout, so my method has to planting steps: Once to a “Jiffy Pot” and then to a 5-gal. bucket. At most growing stores you may purchase “Jiffy 7 peat pots”, or another look-alike brand, for a reasonable price. The entire body of these cups is made of a bio-degradable material that the roots of the plants easily grow through, allowing you to put the entire pot and plant, no pun, directly into the next growing bucket. Be sure to sterilize the buckets before using them for your plants.

WATER: The water you use should be sterile and of a ph level of 6-6.5. In other words, the 25-cent per gallon water from Wall-mart will work fine. A spray bottle for water will work excellent for helping your plants receive water.

INSECTICIDES: DO NOT USE SYNTHETIC AND/OR CHEMICAL INSECTICIDES!! They WILL kill your plants, and if you smoke your plants, they may kill you.


You should use your own best judgment on what seeds to use, but, the basic things you should keep in mind are as follows:

The seeds come from a good background; “The smoke was good.”

When lightly squished between your fingers the seed does not pop.

The more “plump” the seed the easier it will sprout.

The fresher the seed the more likely to grow.

Stage 1: Starting your seeds

To sprout your seeds, get a kitchen plate and two paper towels. Place the first paper towel on the plate and soak the towel with water. Then, put the seeds you want to sprout onto the paper towel at least 1 cm apart. After that, place the other paper towel over the plate, and add more water to soak the towel. Now you may place any food you have for sprouting stage in the plate or add nutrient supplemented water. Place plate under growth lamp, on a 24-hour schedule, and add water daily, to keep soaked. In about one week, or often in less time, you will see the sprouting of your babies. You may now go to Stage 2.

Stage 2: Sprouting in soil

Once you see the sprouts it is time for the sprouting stage. Fill the Jiffy Pots close to the rim. Push your finger into the center until your finger is half the way in the soil. Carefully place one seed in the hole with the root pointing up. This will help to build strength for you baby. Lightly cover the seed with soil and place under intense light. Soak the soil with nutrient supplemented water. If the plant does not get enough light, it will grow tall too quickly and the plant will not be strong enough to support itself and will quickly die. Put the cup on a saucer and put water in the saucer daily. The pot and soil will soak up the water for the plant. You can spray water on the plant to help it and to create a little humidity. The plant will first grow two round leaves, followed by two longer textured leaves on each side. We will call these sets. One more set of two may appear. After that two sets of three’s on each side. After that, sets of five, and, when the plant feels it’s strong enough, sets of seven on each side. If your growing conditions are the best those plants strain have seen, or pretty close to it, you will see nine leaf sets. But all of that is yet to come. When your baby grows the three leaf sets you may move to stage 3.

Stage 3: Jiffy Cup to 5-gal. bucket

Cut hole for drainage in the bottoms of the buckets and place them on trays to collect the water. Fill the bucket up to 2-4 inches from the top. Dig out a hole in the center big enough to hold the entire Jiffy Pot. Soak the soil with nutrient supplemented water. When the plant reaches a height of about two feet, you should go to the flowering stage.

Stage 4a: Flowering

In the fruiting stage, your plants will double their size from start of flowering to maturity, when you can trim, dry, and smoke. You will need to change the lighting schedule from 24 to 12 on – 12 off. You will also need to change the NPK’S of the food to 10-30-10. In anywhere from a few days to a few weeks you will be able to see the buds begin to form. They will look like the buds on a tree, only greener. In a few weeks you will be able to tell sexes. The females will grow two little pistils in the shape of a V out of the end of the little bud. The males will not.

You should keep the females away from the males. The reason for this is that the males mature faster and will pollinated your plants too early. When this happens the entire female bud will be full of seeds.

Stage 4b: Mating (Optional)

It is a good idea to pollinate your females, not only to get seeds for another crop, but also because if you are growing with seeds from a local bag, they will most likely grow at least one hermaphrodite, that is one with a male bud or more growing among the females. When the males mature and begin to open and distribute pollen. When this happens you should collect the pollen with a Q-tip and store it in a glass container until the last 3-4 weeks of the females flowering stages.

The pistils of the females will be white until they are ready to snip. When the plant has reached around twice their size in the first part of the flowering stage, look for the white pistils to begin to darken to a greenish-brown. When you first see this happen, you should pollinate the bud. When about 60% of the pistils do this the bud is ready to clip.

Stage 5a: Clipping and Drying

Clipping should be done with a sharp razor, if you plan to keep growing the plant. If not, cut the branch with a sharp pair of scissors. Either way, you need to trim the leaves and other excess “shake”. Drying should be done as slowly a possible. Place the buds on a screen and place the screen in a dark cool place, at about 60 degrees Fahrenheit, with plenty of fresh air movement. Check on them daily, turning them over, to distribute the drying, and checking for an ammonia smell. If you smell that, there is mold on your crop, and can minimize your yields very quickly. If you smell this, quickly find the source and isolate it from the rest of the crop. Mold can spread of entire yields in less than 24 hours, so beware! When your buds feel like you know they should feel then they’re ready to smoke. An easy way to figure on the best dryness is to roll up a big fatty. If it stays lit, It’s ready to go!

Stage 5b: Curing

Curing can have an excellent effect on your pot. If curing is done correctly, your smoke will have a better smell and a premium taste. It can also make it a much smoother smoke and a more potent bag of weed. If done incorrectly, the disadvantages can range from a nasty taste and a weak high to being so infected with mold, that it can prove fatal. If you smoke local city pot, it usually is never cured, so doing so can be a very nice smoking experience for all whom try your weed.

To begin curing your plants fruit, you will take a paper bag and a plastic bag. The paper bag will provide the darkness required for the process, while the plastic will keep the paper from absorbing the precious THC. Line the paper bag with the plastic bag. Place a few of your buds in the plastic bag until it is a little less than half-full. Roll it down, lightly, so it is not to suffocate them, and roll the paper bag down. Check it daily, smelling for ammonia and turning the buds to distribute the “cure”. What will occur is that inside the plastic bag, the moisture that is left in the center of the buds will work its way to the surface, kind of like as if your plants were sweating. This is what I believe is what creates the better, smoother smoke. If you smell ammonia, or anything that doesn’t smell like buds for that matter, you probably have an infection of mold another like fungus. Once you feel you have mastered basic curing, you can try experimenting with things like adding a piece of fruit, to try to flavor it a little, or any thing else your demented mind can think of.

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  1. dirtydave says:

    Beautiful plants, and great info. One exception though, I highly advise against pollinating your females. Instead, you should number your plants, clone them, label the clones with the number of the plant they came from. As soon as your plants show male tendencies, throw them away, as well as the clones you took from them. Seeding your bud is an aweful idea. No one wants seeds in their weed. They degrade quality. Males don’t produce bud. Clones from females will always be females. You will never have to use seeds again, or waste time/resources growing males. It is possible to get higher yields with plants started from seed, but not worth it. Most research will back what I’m saying. Keeping males is not common practice. They are viewed as a nuisance.

  2. Chronichippster says:

    I have a dwarf growing with a deficiency going on leaves are turning yellow but I’m using a hybrid setup 2 gallon soil pot in a 5 gallon dwc hydro setup with a 45 watt led light think it may be the ph levels but all info an help is greatful

  3. Pirate Botanicals says:

    Thanks for posting this guide! I found it after reading the one Drugs and Bad Ideas posted the other day (http://drugsandbadideas.com/index.php/bad-ideas/50-how-to-grow-marijuana-in-a-closet). One thing I wanted to ask you about. They suggested that you shouldn’t lightly mist the plants because the convex reflectors can cause problems with the grow. I’d never heard of this before and I was wondering if you know anything about this?
    Thanks for taking the time to read my comment and thanks again for posting this guide! :)

  4. Jerry Plake says:

    Dude I bought some clones brought them home and let them get used to my room. Then I transplanted into Fox farm ocean forest soil, and my plants look like crap I didn’t add anything else to the soil means it comes with plenty. Any idea on what happened

  5. Cannabis cancer says:

    Thanks for writing this awesome article. I’m a long time reader but I’ve never been compelled to
    leave a comment. I subscribed to your blog and shared this on my Facebook.
    Thanks again for a great article!

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