GS Plant Foods Organic Crab (8 Lbs) is a fantastic natural slow release fertilizer that is beneficial for all plants including Tomatoes, flowers, vegetables etc. Provides a range of necessary nutrient and minerals including Calcium and Magnesium. Crab Shell chips gives an element for roots to engage with, promoting growth of mycelium, which extend to look for water and nutrients such as nitrogen, carbon, potassium and phosphorus, which the mycelium transports to the plant so it can continue to produce biomass and grow. Provides a natural nematode control . Derived from Crab Meal, Molasses. 3-3-0 Directions: Apply 0.5 to 1 lbs per 100 sq ft/ 5-10 lbs per 1000 sq ft. to soil and work into depth of 6-8 inches.