A standard closet can be broken up into sections. The bottom section is smaller and lit for 24 hours a day, holding the main marijuana plant and all the cuttings, using a fluorescent light. The bigger top section is holding the marijuana plants that are flowering because of the 12 hour light cycle, and is using a metal halide (MH) bulb of either 250 watts or 400 watts, depending on your closet size. If you grow a variety that is quick to mature (6-8 weeks) then you should be able to get 6-7 crops within a calendar year. You can also use an old refrigerator that is sitting in your basement or garage for this. It is easy to incorporate a hydro or CO setup within this environment. You can hold from 6-12 marijuana plants this way, with each plant producing about one ounce (30 g) per cycle of 6-8 weeks. If you are new to growing or experienced with growing, this simple space guide will help you start a private, personal marijuana farm. You just need a space that is 2'x4'x5' tall or larger that can be divided into smaller sections and will not leak light outside of the space you are using. This is what makes a fridge such a great option! The lighting will require you to have one 4' (120 cm) fluorescent tube or more, depending on the space you are working with, and one ballast to use above the plants you are trying to grow the vegetation. You will also need to buy a 250 watt or 400 watt MH bulb for when you begin to flower your marijuana plants.
Next you will need to buy a fan that is small enough to fit within your space to carefully blow a bit of air around your growing marijuana plants while you have the lights on. The fan will also keep the room at the right temperature 77 °F (25 °C) and give your space a fresh supply of CO² . You can use a fan to blow the air out or suck new air in, but either way this is a necessary step. The initial harvest will take approximately three months to go from simple seeds to a harvested crop, so make sure you buy the best seeds to begin this process with. The better seeds you start with, the better your end result will be. Seeds that are started directly into growing medium with 24 hours of direct light will have the best chances at successful growth. The fluorescent lights can be placed just 2" (5 cm) from your new seedlings to help them grow. It takes about three weeks to get the first pair of marijuana leaves to sprout, and this is when you should begin fertilization. Use a 20/20/20 fertilizer, preferably Formula Flora, but dilute it to approximately 25% to start the fertilization process. You can also use organic fertilizers, but just be careful that you do not over-fertilize.
After another three weeks from fertilization, you will want to move your marijuana plants into bigger pots or rockwool cubes. This is when you decrease the light to 12 hours on and 12 hours off, signaling the marijuana plants genetic code to flower. Keep watering and fertilizing when necessary, but only during the lit hours of your growing location. The dark times need to be left undisturbed or else you risk delaying the flowering of your marijuana plants. Within approximately one week, you will begin to notice male marijuana plants. You can tell these apart by the little green hanging pods. Once you are sure the plants are males, remove them to allow for a better crop of females. Keep the male plants in a different location and harvest them prior to the release of pollen for a potent boost to your normal harvest. The females of the crop will begin to become more obvious as they grow bushier, producing numerous small, white pistils. Females will eventually develop a cola that the males will not. If your marijuana plants grow too tall, make sure to bend them instead of pruning them. The best strains are going to be those that mature quickly like an autoflowering type or a pure indica strain.
Once you have completed your first harvest, take your most potent, vigorous and best flowering female plants and prune them back to where you leave a few flowers and 3-4 sets of branches near the bottom of the plant. Put your prized females under 24 hour lights again to bring them back to a vegetative state. A couple weeks later, you will notice some really quick growing shoots appearing. These are great to take cuttings from to begin new marijuana plants. Cut off a few 3" (7.5 cm) of these shoots and re-root them under 24 hour lights. Make sure you keep the females alive so you can take future cuttings from them as well. After another three weeks for vegetative growth, move these new plants once again to the 12 hour cycle section of your growing location. Following this procedure will allow you to bring in a new harvested crop every 6-8 weeks in rapid succession. Just keep following the same time line so that you are able to constantly keep another crop growing while you wait to harvest the crop that is in the 12 hour light section. You will constantly produce new buds and always have a new stash available!
No matter what type of plant you want to grow, it will need carbon dioxide (CO²). Now, standard air is 0.5% carbon dioxide already, but plants are able to thrive off of five times as much, giving them five times the growth when this environment is achieved and there are enough of the necessities available to the plant (nutrients, lights and enough water). Now, if you add in the natural abilities of yeast, a living, breathing and reproducing carbon dioxide machine, you can get the perfect environment for nearly any plant. All you need is a sugar and water combination for the yeast to help produce enough carbon dioxide to help all your plants thrive. Brewer's yeast is a simple and cheap way of achieving this goal. All you'll need is a jug, a cork that fits the jug and some flexible rubber tubing to put the carbon dioxide where you want it. We recommend between six and ten feet (180-300 cm). These can easily be found at many stores. Just ask the person helping you to direct you to either brewing equipment or the area that has supplies for boosting the carbon dioxide for standard house plants. This will give you everything you need in one place.
Want to read more about marijuana? Go to our marijuana grow guide.