If so you may be killing your plants with kindness, especially when it comes to mulch. While all plants grow better with mulch, too much can kill them. The secret to nurturing a healthy landscape is to know when enough is enough.
Two to four inches of mulch is ideal for landscape beds. Deeper layers can cause problems, especially when piled against the trunks of trees. Known as volcano mulching, this practice can slowly kill trees and shrubs.
To learn more about mulch related problems and the right way to mulch, read the whole article on the Pender Cooperative Extension website: http://pender.ces.ncsu.edu/2012/10/can-too-much-mulch-killl-plants/