Archive for magnesium

Sulfate of Potash

Gardening Question: In the rose-pro method of caring for roses in your book, it calls for sulfate of potash (0-0-22) which I can’t find in ANY nursery or hardware store around here.  I did find Sul-Po-Mag which has the same NPK numbers, but also contains sulphur and magnesium.  Can I use this instead? Answer from […]