This is a prevalent marijuana potting soil and has an almost neutral pH. It offers excellent drainage and water retention, contains high oxygen levels, and is naturally fertile. However, it is by far the most expensive option.
At wayofleaf.com, we took the liberty of recommending a few store-bought soils for your cannabis plants. Please note that these are NOT for seedlings, as they contain too many nutrients. These are soils designed to help your plant thrive once it reaches the vegetative stage. Otherwise, you need to look at potting soil brands when your plant is still a seedling.
What Does Loam Soil Look Like?
It is, however, the best soil for cannabis, which means it is worth the time and effort that you have to put in. No matter what type of soil you have, creating loam involves adding organic matter to it each year. The decomposing plant material creates the excellent drainage conditions your weed needs.
When growing weed outdoors, make sure you use soil that feels fluffy in your hands. It needs to possess a reasonable amount of nutrients, and good drainage is essential. Compost and store-bought fertilizer can form a fertile and productive base. Crucial nutrients include Nitrogen, Potassium, and Phosphorus.
Best Cannabis Soil Brands
Of course, ample water and oxygen in the soil is a must.
Test kits are available to measure your soil’s acidity, or you can take a sample to your friendly local extension agent. If your dirt does not have the proper acidity, soil amendments are available to lower or raise the pH level in your soil. Your local nursery, garden store or extension agent can make some suggestions.
Of these types, loam is by far the best soil mix for growing marijuana plants and many other types of crops. Loam is a mixture of clay, sand, and silt, bringing forth the best qualities of these disparate types of soil while minimizing their worst attributes.
The optimal ratio for loam is 20% clay, 40% silt and 40% sand. Most folks think a pH of 6.0 is best for cannabis, with a range of 5.8 to 6.3 being acceptable. With a pH close to neutral, loam is typically in that zone or close to it.
Loam for Growing Marijuana & Other Crops
Four basic soil types exist: sand, clay, silt, and loam. Each has its pros and cons for gardening.
Sand is easily permeable for root growth, for instance, but it does not hold on to water or fertilizer well.
Just like humans, plants need the right nutrients. The most important ones for your cannabis plants are nitrogen (N), potassium (K) and phosphate (P). These make up the ratios you will typically see on fertilizer labels.
Silt soils have lots of minerals and retain moisture well. Like clay, however, this type of soil can become compacted and hard in certain conditions. It can also form a crust, making it difficult for moisture and nutrients to reach plants’ roots.
Clay is just the opposite. When it’s hot and dry, clay can become hard as a rock, making it difficult for roots to penetrate. Clay drains poorly and is hard to cultivate. On the plus side, it is rich in minerals and natural nutrients.