In one word...very! The right growing medium will determine the health, vitality, harvest size and potency of your crop. The best soil mixes would combine proper aeration with rich organic nutrients from which to nourish the roots from and would require little to no added fertilizers except for mid flowering where a bud booster can be added to enhance yield.
It is important to remember to always use fresh unused soil for your marijuana plants as this would provide the best growing environment for them. And never compact the soil when transplanting your cannabis plants. Just lightly pack the soil to ensure proper aeration. The roots loves to breathe.
Paying attention to your soil mix is one of the best investments you can make in growing and harvesting marijuana. The health of your plants, buds & harvest depends upon what your plants soak up from their root systems. So making sure that the growing medium is the best for your garden is a wise step to take. Below are some examples of soil mixes used to grow marijuana successfully.
Example of a Soiless Mix:
One of the most common growing mediums for cannabis is a soiless mix. This a mixture of components that does not contain garden soil. Soiless mixes provide greater aeration to the root system and allow for more frequent feedings.
