Looking for a substitute for Epsom salt to spray on my plants to prevent Nute lockout asap. I have checked nearly EVERY store in the city I live in, and no one sells it. I wasn't to concerned on having this on hand before, since I thought it would be simple to find at any health/drug/gardening store. I could order some online, but think by then it might be to late. (this is for a hydroponics set up).
Anyone know of one?
Anyone know of one?