Dean - Thai crotons, i.e., those imported directly from Thailand, have a notoriously low survival rate when grown in most places in Florida. Dave Hickman (?) imported a load of them some years back. The ones I purchased from him never seemed to grow out of the coir dust rooting medium. Our cool/cold winters do not help either; it may be hot and humid in the summer but it is not Bangkok either with its year round warmth and humidity. I suspect that they would grow quite well in the warm and rainy parts of Hawaii which do not experience the seasonal temperature and humdity variations that much of Florida experiences.