Leaves turning yellow and falling off?
Hi. :) I bought two plumeria cuttings last february when I went to hawaii. Since then, I've potted them in normal garden soil with lava rocks at the bottom of the pots for drainage. They've grown pretty well, but lately one of them is starting to get yellow leaves. At first I thought it was because of overwatering, so I stopped watering them so much and it temporarily stopped, but today I noticed the leaves turning yellow again! I know they aren't thirsty because the stems are hard and sturdy. What else could it be?
Here's a picture of both of my plumies, and a close up of the currently yellow leaves. The right one is nice and full of leaves but the left one has hardly any left compared to what it used to have. :(