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This may be useful information if you want to start growing some sticky-icky for yourself. Home grown herb can be very good if you start with some decent seeds. Check out the previous post to get instructions on how to start your seeds. Marijuana is like any other plant, if you supply the right environment they grow like.... weeds (pun intended)
Growing Marijuana Indoors
The following info about growing marijuana indoors with soil. It is a good way for the first timer with a limited budget to start. You may also be interested in growing hydroponic marijuana. It shows how to grow marijuana indoors without soil. Some of the information can be applied to growing marijuana with soil.
Indoor growing has many advantages, besides the apparent fact that it is much harder to have your crop found, you can control the ambient conditions just exactly as you want them and get a guaranteed good plant.
Plants grown indoors will not appear the same as their outdoor cousins. They will be smaller and may require you to tie them to a growing post to remain upright.
However, the marijuana from plants grown indoors will be more potent (if you provide optimal conditions) than that of the same strain being grown outdoors. Plants will take longer to grow in soil than they would in a hydroponic garden, but they can be just as potent.
Select a grow area and put tar paper or plastic drop sheets on the floors to prevent damage from water or other sources. The walls of your growing room should be painted white to reflect the light.
Containers for houseplants can be used or you can use almost any container that is clean and has never been used to store chemicals or anything else that might be toxic.
The height of the container should be from 12 to 24 inches. Width and depth should both be about 12 inches. 3 and 5 gallon containers do a good job and are easy to find.
You will need enough soil to fill each container to within 4-6 inches of the top. Make sure to provide drainage holes at the bottom of the container if it was not designed for growing plants in. There should be enough holes to allow any excess water to escape and they should be small enough so that no soil is washed away.
Buy sterilized bags of soil form a gardening supply store. Ask a salesperson for soil that was designed for indoor use with fast growing vegetables. You need soil that is fluffy when moist. It shouldn't clump together if you gently squeeze it in your hand.
Organic potting soil is a good choice, if available. If you are already used to gardening, mushroom compost or soilless mixtures might be something to look into. Stay away from anything like clay or sand.
After harvesting, add the soil that was used to grow a crop to your outdoor garden, do not try to use it to grow another crop. See the section about nutrients and marijuana grown in soil so you know how to feed the plants.
Soil pH should be in the 6.0 to 7.0 range. Get a pH meter to measure the soil pH if needed. Most nutrients (fertilizers) cause a pH change in the soil. Adding nutrients to the soil almost always results in a more acidic pH.
The lighting system can be fluorescent, but metal halide (mh) or high pressure sodium (hps) are recommended. Metal halide or high pressure sodium lights provide enough light to grow potent marijuana and should be used by any serious gardener. Make sure you understand lighting and how it affects marijuana plants before setting up your grow room.
If you don't have enough money to buy a metal halide or high pressure sodium light fixture, fluorescent light can be used instead. This is a good introduction to growing, but the results will not be as good. The best sources are those designed especially for growing plants.
Figure about one plant per two feet of fluorescent tube. Fluorescent light sources should be an average of 3-6 inches from the top of the plant. They may be mounted on a rack and moved every few days as the plants grow.
Once you have your grow area setup you will want to introduce your seeds or clones. If you have clones you can place them in the growing containers. If you have seeds, you will need to germinate them before they can be placed into the containers.
Set your light timer for 16 hours on and 8 hours off per twenty four hour period. Keep this light pattern for the first two weeks in the containers.
When I grow with mh or hps lighting, I like using a fluorescent light for these first two weeks of seedling growth. A standard 48 inch fluorescent light fixture sometimes used in garages and kitchens can be found at most department stores. You don't need special grow lights for this purpose, 'cool white' bulbs made for standard 48 inch fluorescent light fixture are cheap and will do a fine job.
After about two weeks under the 16 hours on and 8 hours off light schedule the plants should have put down a good root system and grown a few sets of leaves. At this point you should increase light by an hour a day. You can leave the light on from 18-24 hours a day at this point in the plants life (vegetative phase).
If you have mh or hps lights, now is the time to introduce them to your garden. As you increase the light, the plants grow faster but power consumption increases. This power increase doesn't make a lot of difference with low wattage lights, but mh and hps lights require more power. The more power you use, the higher your electric bill will be.
When the plants are about twelve inches tall, cut the light down to 12 hours on and 12 hours off per day. This will cause the plants to flower. After the plants flower, you will have to remove the male plants unless you want to produce seeds. White hairs (pistils) will begin to develop at bud sites of female plants.
If you are growing under mh or hps in soil, it will be about 10-12 weeks (after flowering starts) till harvest time. Total time will be about 12-16 weeks from seed or clone to harvest time. If you are growing under fluorescent light it will take longer before harvest time, the plants will not produce as much marijuana, and the marijuana that is produced will be very weak.
With a metal halide or high pressure sodium light fixture, a 250 watt light (either mh or hps) is good to grow up to 6 plants at a time (force flowering when they are about eight inches tall). Each plant will yield about 7-14 grams of marijuana in 12-16 weeks.
With a a metal halide or high pressure sodium light fixture, a 400 watt light (either mh or hps) is good to grow up to 12 plants at a time (force flowering when they are about twelve inches tall). Total yield is about 8 ounces of marijuana every 14-16 weeks.
Temperatures should be between 70-80 degrees F when the light is on. When the light is off the temperature can drop to the low 60's and have no negative effect on the plant.
The temperature should never go below 60 degrees or above 90 degrees (even for short periods) or growth will slow down. If these extremes are exceeded the plant may be permanently damaged or killed.
Humidity should be between 40-60 percent relative humidity. Use a hydrometer to measure humidity if you think your grow area is out of range. A humidifier can increase humidity and a dehumidifier can be used to lower humidity.