Tuesday, September 13, 2011

The Basics Of Growing Medical Marijuana (Cannabis)

By Lawrence Greene, MD


Patients that have a valid medical marijuana ID may grow their own marijuana to utilize for their debilitating condition. Sixteen states have legalized medical marijuana - each one has varying allowable amounts.

Whether grown indoors or outdoors, cannabis has the same growth requirements. The basic needs are light, air, water, nutrients, a growing medium, and heat. When grown indoors, the light needs specific intensity and spectrum and the air needs to be warm and rich in carbon dioxide.

Typically an annual plant, cannabis has distinct growth phases. They are termed germination, seedling growth, vegetative growth, preflowering, and flowering.

The Germination stage entails hormone activation in the seed's durable outer portion. Inside the seed, the embryo expands and the coating of the seed splits. This permits rootlets to expand down and a sprout with seed leaves growing up in search of light. This stage takes three to seven days.

During seedling growth, the single root grows downward and creates branches. These tiny branches pull in water and nutrients. The roots anchor the plant in the growing medium. Lots of light is needed during seedling growth, about 18 hours per day.

Once the vegetative growth stage is entered, a lot of light is still necessary, about 14-24 hours per day. The roots develop and grow a water transport system, and food is also stored. Single celled root hairs are the parts of the root that absorb the nutrients and water, and unfortunately they tend to be delicate and easily damaged by light, air, and carelessness during exposure or movement.

The stem also elongates, producing new buds with the lateral buds turning into branches or leaves. The central bud carries growth upwards. The stem carries the water and nutrients from the delicate root hairs to the buds, leaves, and flowers. The stem should not be bound too tightly with strings or tie downs.

The stem provides support for the plant as well, and if it's an outside plant wind and rain help strengthen the support by stiffening cellulose. If the plant is an indoor plant the stem doesn't receive the stimuli, so the stiffening doesn't occur and a stake may be necessary for support.

Photosynthesis occurs as plant leaves expand and food is manufactured.

After week four of vegetative growth, pre-flowering happens. The pre-flowers grow between the fourth and sixth node from the bottom of the plant and end up either male or female. Unfortunately male plants have much less cannabinoid, so growers often destroy them.

Flowering is triggered in most commercial marijuana plants by alternating 12 light hours with 12 dark hours daily. Flowers form during the final stage of growth and if the females flowers are not pollenated, they develop seedless - called "sinsemilla". If pollenated by a male, female flower buds develop seeds.

If the plant doesn't get pollenated for a few weeks, THC production peaks in the female unfertilized sinsemilla. With fertilizing, the female matures its seeds, which then either fall off or get collected for subsequent planting.




About the Author:



No comments:

Post a Comment

Check this link for other related articles:

My Random Articles

Yey Health