Growing organic anything can be very rewarding.  Growing marijuana organically can be extremely rewarding, think about it.  An herbal medicine grown in its natural elements, providing relief for so many conditions, truly priceless.  Since people will be ingesting the herb you produce, choosing to grow organically is a noble thing, but human consumption isn’t the only reason to grow marijuana organically.

Organic fertilizer is much easier to use than chemicals.  The marijuana plant uses the nutrients that it needs and leaves the rest in the soil.  Where as with chemicals, the nutrients are in a highly soluble state.  The roots of the plant are forced to try to absorb all the chemical and could become burned and damaged.  Organic nutrients break down slowly in the soil giving the plants a steady dose of available fertilizer.  This keeps the cycle more natural with the soil being fertilized and not just the roots of the plants.

Organic advantages can be seen more so in outdoor marijuana grows.  It works very well having organic fertilizer under the sun.  Outdoor marijuana grow ops are less likely to have a lot of attention and so amending the soil makes good sense.  Especially be sure to apply a heavy dose to the top soil, this way every time it rains the soil is saturated with rich nutrients.  It is unlikely that you will be able to fertilize outdoor plants as much as needed if you were using chemicals.
For indoor growers organics pose a few problems.  First they are not as scientific, making it more difficult to determine exact doses.  Also because organic nutrients keep the soil so healthy it can lead to insect or pest trouble.

Examples of commonly used fertilizer in Organic Marijuana Growing;

BLOOD MEAL: 13-0-0

Blood meal has one of the highest levels nitrogen of all organic fertilizers and therefore is popular during vegging periods.  In its solid form it can be added to soil or soil less mixes at a rate of a half cup per gallon of soil mix.  It can also be diluted and used as a soluble fertilizer much like a chemical.  To do this let a few tablespoons of blood meal soak in a gallon of water for a week and then water your plants with the blood meal tea.

BONE MEAL: 1-11-0

Bone meal is made of ground up bones and is high in phosphorus.  This makes it suitable for flowering periods.  Bone meal is a slow release fertilizer and is acceptable to add to your mix early in the season.


Fish emulsion is basically liquid fish.  It is very gentle on plants and has been used to grow fertile crops in North America for hundreds of years.  Fish emulsion is good for young plants.

WORM CASTINGS: 0.5-0.5-0.3

Worm castings means worm poop.  Although the nutrient levels are low plants seem to really thrive while being fed worm castings.  Worm castings have been a go to fertilizer for a long time.  Worm castings are also safe to use on young plants

KELP MEAL: 1-0.5- 2.5

Kelp meal is like vitamins for your plants. Kelp meal has over 60 trace elements.  It also contains enzymes and hormones that make certain your plants has enough micro nutrients.  Kelp meal can also be made into a tea.

Growing marijuana organically is a very rewarding and noble practice that produces some of the highest quality  medical marijuana.