Canadian Wollastonite The Multi-Purpose Mineral
Application Rates
General application rate recommendations are 2-4 tonnes/acre when beginning to use our agricultural grade Wollastonite. We encourage growers to experiment with higher and lower application rates to optimize results.
The following rates are suggested as guidelines for Canadian Wollastonite:
| Application | Rate |
|---|---|
| Greenhouses | 6 to 10lbs/cubic yard (1/4c./ga) |
| Gardens | 1 cup/yard of row at seeding 2tsp. to 1/3 cup at transplanting 2tsp./plant topdressed |
| Vegetable Fields | 2 to 4 t/ac broadcast, 150 to 600 lbs/ac banded at seeding or transplant (according to crop family) |
| Field Crops | 2 to 4 t/ac broadcast ag grade, 300 to 500 lbs/ac banded micronized |
| Turfgrass | 1 to 2 t/ac |
| Lawns & Trees | 50 to 100 lbs/1000 sq.ft. |
The Power of Small Powdered Canadian Wollastonite
Wollastonite is available as a fine powder with 90% passing 200 mesh greatly enhancing the release of the product providing close to immediate results with much lower application rates.
Application rate varies depending on the application and caution is required when applying this product due to its high reactivity. Please contact us for more information.
Considerations & Guidelines
Application timing – Apply wollastonite anytime of the year. Growers report benefits for 2-4 years after application.
Adjusting soil pH – Use 30% more wollastonite than a typical lime (80% CCE). Wollastonite’s release is slower than lime and as pH rises, the wollastonite will slow down in it’s release of calcium helping to stabilizing soil pH close to 7.
Compost – When adding Wollastonite to compost we suggest mixing it with mature compost towards the end of the process to avoid altering the pH of the pile during the thermophilic ‘hot’ phase.
Wollastonite should be used as part of a complete fertilizer program.
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