I am pretty sure it is the humidity that makes them wilt. That is also why Arils don't do well. We can grow 1/4 and 1/2 Arils but the full Aril likes it dry. I think the Pacific Coast like the cooler breezes off the coast too over heat.
"The chimera is a one time happenstance event where the plant has a senior moment and forgets what it is doing." - Paul Black