Tropicals & Tender Perennials: Spots on Plumeria Leaves, 1 by JPlunket

JPlunket wrote:
This one went into the ground last December, here on the island of Vieques, Puerto Rico. She gets about five hours of morning sun, then shade, and is drip irrigated. I have used Osmocote 17-17-17 to feed and a variety of insecticides/fungicides (orthene and Neem oil mainly), though perhaps not frequently enough.

What is causing the dark spots on the leaves?

Also, no flowers yet --will she produce at some point here, or should I move her to a sunnier spot?

Thanks for any insights you can provide.

JP