what causes plumeria bark to turn black
Once a Plumeria has survived it's first winter, Stem Rot is usually not a problem. Plumeria Cuttings : Infected cuttings typically fail to root. Instead they develop rot that gradually moves up the stem. Leaf wilt and leaf spotting may be evident. The rotted stem eventually becomes shriveled, turns dull dark brown to black in color, and falls over in its pot. Mature Plumerias : Although rare, mature plants can lose a branch or two from stem rot and/or freeze damage. Freeze damage looks almost the same as Stem Rot. In either case, with mature plumeria just cut off the affected areas and a mature plumeria will bounce right back with new branches and leaves.