For best results, apply wollastonite according to soil test results and agronomic recommendations. Application rates will vary according to plant requirements and soil conditions. Consider calcium and magnesium requirements in addition to silicon supplementation when using this product as part of a balanced fertility program
Add 6 to 10 pounds of wollastonite per cubic yard of soilless mix (1/4 cup per gallon)
Add 1 cup of wollastonite per metre of row at seeding. Use 2 tsp. to 1/3 cup of wollastonite per plant at transplanting. Topdress plants with 2 tsp. of wollastonite weekly or bi-weekly.
Spring or fall application; incorporation is recommended. Apply at 1.5 to 4 mT/ac. Sandy soils, soils low in organic matter; cucurbits and brassicas will respond to higher rates.