I think you've added a new plant to my wishlist=) Found a bit more info on them in the link below. Any chance you'd be willing to trade a seedling? I have Zephyranthes citrina (small yellow flowers) and Zephyranthes candida (white flowers, blooms after thunderstorms). Send me an email if interested. Thanks for the great informative post! Angela Here is a link that might be useful: Zephyranthes atamasca

Brugs are just so much easier to grow in the ground in our zones...In the pot, you may end up watering it 2 or more times a day to keep it happy. I get hard freezes here also but they all faithfully return from the roots every year. Yes, I do try and cut to the ground right before first frost. You can save and root cuttings this way and have more for next year! I'm not sure about the datura at all. I've grown them before but the one's I had didn't thrill me so it's been a long time...It should reseed around for you and it may or may not do better in a pot. Maybe one of the datura experts here can chime in on that.

High nitrogen is not good for plumies because they grow leggy, but it is ok for seedlings and new plants. Even numbers (20-20-20) are commonly used in the spring moving to high P in the summer and high P-K in late summer. Stop about a month before cool weather to allow the plant to harden. No water or fert. necessary while dormant-wet roots rot without leaves to take up water. Leave it outside as long as there is no threat of mid to low 30s. Usually mid to low 50s will induce dormancy along with the shorter light. Protect the bare plant from freezing or cold temperatures. No light, water, or anything except keeping warm is neeed. It is programed to wake up about March. at that time give it a tablespoon of epsoms salts in warm water (gal.) to jump start the wake up. Let it dry for days in between watering as until temps go over 85 they are better dry to moist than wet. Don't put fertilizer next to the stem if granular as it will burn the plant and induce rot. Neglect is better than over-messing with plumerias. Soils need to be fast draining usually mixed with perlite and/or pumice and avoid any that retains water. Bill

Much of that depends on your climate and watering habits. I could never just use perlite. It's too dry where I live and my plants would all die even being watered once daily (which I can't always do). Technically, throwing park on top of perlite should be fine. I throw a layer of Sphag on top of bark to hold in some moisture. You should do what works for your situation. There is no one single answer for an orchid in captivity...