Directions of Use
Shipping & Return
Gypsum can be top-dressed, mixed into soil or used in waterings, with NO negative impact on plant health. Gypsum can be applied in heavy doses with no issue and provide an intermediate length source of calcium and sulfur. Gypsum has a solubility of aprox 2g/ L at room temperature allow it to be used as immediately available organic source of Calcium and Sulfur.
- We recommend at least 2 cups of Gypsum per 25L of Medium.
- 1 Cup per plant can be used mid cycle to treat calcium issues.
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