Tim, hard to tell as well. Only thing I could think of thoug is if you have this in full sun at 85-90's heat, I would remove those pea gravel around the base of your plumeria because it could get too hot and will burn your plumeria base stem. I oils add soil up to the rim of the pots. I've been planting sedum and succulents on the base of my plumerias to minimize pulling weeds and also they are decorative.