The hardy Schefflera delavayi is looking great after two nights in the 20s this year…still in full flower. We’ve got a great looking crop ready to ship! These survived single digits last year with no problem and have been growing happily here since 2003. We’d love to hear from folks who have tried them in colder climates.
Here’s my update on the S. delavayi I picked up at PDN last year, growing in Washington, DC (zone 7a/b): http://dctropics.blogspot.com/2014/10/schefflera-delavayi-one-year-later.html
Are you working with any of the other hardy shefflera species? Do you expect to be offering any soon?
Yes, we have several species in trial. The key is finding species that tolerate both our winter and summer temperatures.