A couple days ago, I had moved the plumeria seeds out of moist paper towels and into moist coffee filters, because I was having problems with a variety of seeds getting a little moldy in the paper towels. The coffee filters seem to be a little more sterile, and I spray them with hydrogen peroxide water, so that helps too.
One of the plumeria seeds sprouted a little root. Unfortunately, it sent it’s root down through the bottom of the coffee filter. I had to cut the coffee filter away around it, but the root did not seem to sustain any damage.
I potted it into moist vermiculite, which is where I plan to leave it until it starts sprouting above the surface.
The pot is going inside a ziploc bag for now, to help retain moisture. This will be placed in a warm sunny spot, though avoiding direct sunlight to avoid baking the seed.