Fix my plant

Soybean meal is a plant based fertilizer with about 7 percent nitrogen. Learn how fast it feeds cannabis and why it should go in before planting.

Crab meal is ground crab shell that adds nitrogen, phosphate and lime. See its typical analysis, how fast it works and how to use it in cannabis soil.

Oyster shell flour adds calcium and slowly raises soil pH. Learn how fine it must be, when cannabis beds need it and how much to mix into the soil.

Insect frass is the residue left from raising black soldier flies. See how it works as a cannabis soil amendment, what it adds and where it falls short.

Greensand is a marine mineral sold as organic potassium. Rutgers soil scientists rate it as a soil conditioner first. See where it fits in cannabis beds.

Feather meal gives cannabis a slow, steady nitrogen supply. See its typical analysis, how fast it releases, how much to mix in and when to use it.

Rock phosphate is a mined mineral that releases phosphorus over several years. See its analysis and why soil pH decides whether it pays off.