What is the best time for Epsom salts?
I have put them on before, and I think it improves the roses, but should I do it before budding or during budding or during flowers? How much and how often should I do it. I have alkaline sandy soil with a pH problem that indicates I need more phosphorus. I was thinking of buy super phosphorus, but I don't want to burn my roses. Can you use them on all the other plants in the garden as well? Do you dissolve in water first or just sprinkle on the ground?