Pygmy Date - Osmocote is easy & you only have to do it once a year. The Palm Tone type fertilizer should be fine, but only do it once a year. In addition, you can also throw in a liquid fertilizer like Miracle Grow every once in a while in growing season (I do). No fertilizer after mid-summer. I keep my potted palms outside in high shade spring through fall here in Georgia (Kentias & Rhapis). They luvit.

Windmill - I fertilize in April with good brand of tree & shrub fertilizer that lasts 2-4 months. May do it again before the end of June. And that's it. Osmocote in spring is also a good alternative. BTW my windmill is a 6' monster. I'd post a pic but I'm kinda lazy this evening.

thanks davidcf.
Do you fertilize like I was told on your large windmill-keep fertilizer away from trunk and work it in around the outside perimeter of the leaves? I'm a newbie obviously and haven't fertilized it since it's planting in April. Of course then I just mixed it in with the soil.

I just spread it on top of the pine straw underneath the leaf canopy where the roots are. Then I water it in.

Thanks. By the way, I'd love to see the pic of your 6' windmill sometime if you ever feel like posting one.

I used www.treehelp.com to order fertilizer specifically for palm trees. I just planted 2 3-4 feet Windmill Palm trees.