We got a question today on Twitter about blending calcium sulfate with other fertilizers so we're sharing the answer with everyone....
Our SuperCal SO4 gypsum (calcium sulfate) is compatible with any standard fertilizer. You should blend it to meet our application rate on the bag. Target your application at roughly 10-20 lbs of our product per 1000 square feet.
Our calcium sulfate is analyzed at (0-0-0-21Ca, 17S), so for each 100 lbs of product, there is 21 lbs calcium and 17 lbs sulfate. That means in 10 lbs of product, there would be 2.1 lbs calcium and 1.7 lbs sulfate applied over the 1000 square feet.
Example, if you have a fertilizer that is 10-10-10 and you are targeting 1 lb of N per 1000 square feet, you need 10 lbs of that fertilizer to accomplish that. If you want to blend in our product to supply Ca and S for that same area, you should blend 10-20 lbs of our product in with the 10 lbs of standard fertilizer. If you want to make it simple and blend a whole 50 lb bag with our product, you can assume, at that targeted rate, you'll cover 5000 square feet with a 50 lb bag of 10-10-10, so you'll want to add 50-100 lbs of our product with that fertilizer.
More questions? Email me!