What are peoples experience with the hardiness of these? The Freeze Damage section has no entry for this and my topic search reveals very little. Also, sandy soil and full sun....ok or not?

Dave Witt had them survive 25F in Orlando http://bizmark.8m.com/custom.html

Here is some additional freeze information from him (they were undamaged during this freeze) http://www.palmtalk.org/forum/index.php?/topic/22076-freeze-damage-in-metro-orlando/

Thanks David.....anybody got these even further north in 9a ?

cypress gardens or now legoland has 2 cocothrinax crinita planted for 12 years + now dont know if that helps but you should have no problem

USDA wise, I am 9a, but realistically 10a (have a few 10 yo coconuts) - have not seen anything below 35 in 2 years. I have had 3 crinitas survive 29's with no problem and have all three now alive for about 10 yrs. Don't know about 25F, I have never seen that here. Once they get started, they seem to grow reasonably fast. My biggest from seedling now has about 6ft of furry trunk.

Mine went through 23/24 in 2011 with no damage, HOWEVER, it was under oak canopy where it got no frost.

Here is one of mine used to grow in my garden. It has proven very cool hardy but unfortunately not cold hardy enough. It perished during the cold spell of 2004. For more details you may look at my report about this cold spell in the cold hady section.