Interesting, plumeria seeds huh? Mine are not leafed out yet either, Ken, so as Hetty says I'd wait a bit and see if spring's energy makes them 'take'.
On the fire ant front, my 'remedy' if I can do it is to run - Run! - into the house and put ice straight on the bites as quick as I can. It seems to neutralize the venom if you can get to it quickly enough. Often there's not even a bump if I'm quick. Another 'remedy' I have is an herbal insect repellent called "Herbal Armor" that is available at health food stores and online at rei.com which not only is a nice lotion repellent that works well against mosquitoes, but if you put it on bites after, it takes away the itch. Must admit the last time I got a fire ant bite was at the school garden with no remedy at hand, but I put the repellent on the bite as soon as I got home, and it only itched for a day or two. Usually with me those evil bites last a week.