If you're trying to keep your marigolds (Tagetes) blooming long after everything else has started to fade, Epsom salt might be just what you're looking for — operative word: might. Simply put, Epsom ...

Epsom salt can be good for plants, but only if your soil is deficient in magnesium. A soil test is the best way to know if you need to add magnesium to your garden. Applying Epsom salt to healthy ...