Powdered Oxygen. Grotek Oxy-Cal is a time-released supply of calcium and oxygen for the soil. Oxygen is a life-line for all living organisms and is required by all plants throughout their life cycle for optimum growth.
Oxy-Cal increases the microbial activity to provide a strong, disease-resistant growth medium. This enables the plants to better absorb and use the available nutrients and water.
Available size: 500 Gram Tub
DIRECTIONS FOR USE:
Mix thoroughly with soil at the following rates:
Gardens – Use 250 ml (8.75 oz.) per 100 sq. ft. or 20 kg per acre.
Potting Soil – Mix 9 grams (1 tsp) per 4 liters (1 gallon) of growing media or 4 Tbsp per cubic feet.