Fall or Spring? When to mineralize
Fall is a great time to add amendments that need time in the soil in order to become available.
- Ag lime
- If you need to move cations out with sulfur, then add sulfur before the rainy season
- Ground rock products such as dolomite, langbeinite (SulPoMag), greensand
- Rock phosphate or bone meal only if you have pH<7.0. If you have higher pH, these are best added to the compost pile or worm bin.
Spring is a great time to add minerals that easily leach from the soil.
- Sulfates such as potassium sulfate, zinc sulfate, copper sulfate, magnesium sulfate, manganese sulfate
Minerals move by many mechanisms. We've written a short article on the subject here