Below is a very brief summary on how to grow closet weed. At a high level, it covers the basic process for growing soil-based cannabis indoors for personal use. If you want more detailed information on a certain subject, click on the related link to the right –>
Cannabis soil – It’s best to use nutrient-rich potting soil (Fox Farm, Miracle-Gro) in 8″ clay pots. If you have to use regular dirt, microwave it first on the high setting for about 20 minutes to kill off any bugs, insect larvae, molds, spores, and other unwanted things.
Use the best quality cannabis seeds – Quality plants begin with quality seeds. If you’re going to use common bag seed, good luck. Seeds for many highly potent cannabis strains can easily be mail-ordered and discreetly delivered. “Feminized” seeds are the best, as they virtually guarantee your plants to be feminine in gender and not the worthless male plants that should be thrown away.
Germinating cannabis seedlings – Poke a hole about 3/4″ deep into your potting soil, drop one seed into it, cover lightly with soil, and water. It’s important to keep the soil moist – but not necessarily soaked – at all times during the germination stage, which can last as long as ten days. (Some growers insist on germinating seeds on wet paper towels and transplanting them once they’ve sprouted, but it’s unnecessary work and you run the risk of killing your delicate sprouts if the paper towels dry out.)
Buy 2 cannabis grow lights – Most growers agree that fluorescent Gro lights that are kept on continuously stimulate plant growth the most during the vegetative stage, and that high pressure sodium (HPS) grow lamps work best during the all-important flowering stage. Each type of light emits certain wavelengths that plants need during their different stages of development. You can substitute one for another, but your growth rates and crop yields will probably be affected.
Cannabis fertilizer and nutrients – Plant nutrients are comprised of nitrogen (N), phosphorous (P), and potassium (K). The ratios of those ingredients in a fertilizer are always listed in that order on the product label (N-P-K). During the vegetative stage when the main plant growth occurs, cannabis plants need higher concentrations of nitrogen and phosphorous (a mix of 2-2-1, 5-5-2, or similar is ideal). During the later flowering state, the plants stop needing as much N and P and instead need higher levels of potassium (K). Liquid or powder-based nutrients in a 3-2-5 proportion, or similar, works best here.
Watering cannabis – Room-temperature tap water that has been allowed to sit overnight (giving the chlorine in the water time to evaporate) is perfectly suitable for watering your plants with. However, it will probably be slightly alkaline (a ph reading of 7 or higher), so you may need to add something acidic to it (preferably phosphoric acid, but white vinegar will work in a pinch) to get it into the slightly acidic ph range of 6 – 7.
Cannabis temperature – Cannabis, a hardy weed, can tolerate a fairly wide swing in temperatures. Ideally, your indoor grow closet’s temperature won’t drop below 50 degrees or exceed 90 degrees F. Higher temperatures will require more frequent plant watering.
Using CO2 with your cannabis – It’s been shown fairly conclusively that pumping CO2 into your grow space speeds up the vegetative growing process by as much as 20%.
Effective cannabis pruning - The broad sun leaves on cannabis plants provide photosynthetic benefits to both the plants’ growth, and also their bud (flower) development. Most growers only trim leaves off if they’re significantly blocking light from reaching the lower levels of the plant.
Flowering your cannabis – When growing outdoors, the plants will automatically begin to flower when they sense fall approaching (the days get shorter and dusk comes earlier each evening). If growing indoors, simply switching from an always-on light schedule to a 12 hours on / 12 hours off schedule will trick the plants into thinking fall is approaching, and buds will begin to form.
Harvesting and trimming cannabis – Once your plants are fully flowered and cut down, it’s time to trim off (using a good, clean pair of scissors or shears) all of the leafy plant material that doesn’t have THC-laden trichomes covering it. Only the flowers are smokable; sun leaves contain less than 10% THC.
Drying & curing cannabis – Once trimmed, hang your harvested plants upside down in a dark, room-temperature space where air can circulate freely around them. When you can snap off a couple of stems cleanly instead of just bending them (usually within one or two weeks), your plants are ready for the final step – curing. Cut your buds off their stems and place them loosely into glass Mason jars. “Burp” the containers by opening them for a few hours every other day for a week or two. This allows them to lose any remaining moisture within the buds that may cause mold to develop.
You now know everything you need to know about how to grow closet weed. Happy growing!