Sea grapes will grow to enormous proportions without any care. Cabbage palms love it here and get huge! Live Oaks will get enormous. All natives. Please don't resort to invasive species...this is such a delicate ecosystem and invasive plants cause so much damage, so quickly. The Australian Pines resist the growth of native orchids and bromeliads and put out a natural herbicide (alleopathy) to prevent anything else from growing nearby.