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triathalon BA

Wollastonite natural calcium silicate fertilizer 4 pound bag


  • Model: VANSIL W10, 4#
  • Shipping Weight: 4lbs


Wollastonite. 4 pound bag

Natural Calcium Silicate fertilizer


Use as an alternative to lime and to provide Plant Available Silicon and Calcium in your soilless potting mixes.

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

Horticultural Applications


Add 6 to 10 pounds of wollastonite per cubic yard of soilless mix (1/4 cup per gallon)

Home Gardens:

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.

Market Gardens/Field Vegetables:

 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.

Typical Chemical Analysis (calculated as oxides)

Calcium Oxide (CaO) 45% Calcium (Ca)   34%
Silicon Dioxide (SiO2)  50%

Total Silicon (Si) 24%

Soluble Silicon(AAPFCO 5 day method) 3.6%

Aluminum Oxide (Al2O3)   0.7% Magnesium Oxide (MgO)   1.5%
Iron Oxide (Fe2O3)   0.2% Sodium Oxide (Na2O)   <0.1%
Manganese Oxide (MnO)   <0.1% pH of a 10% slurry 10-11

This product was added to our catalog on Wednesday 24 August, 2016.