JMBreland Posted December 2, 2014 Report Share Posted December 2, 2014 In preparation for the palm segment of the "Ornamental Grasses and Their Cousins" garden tour at Jacksonville Zoo and Gardens, I'm realizing that I don't really have a clear answer why Trachycarpus fortunei, windmill palm, tend to not do well in zones 9 and warmer. It is known in palm circles that windmills prefer cooler climates, love clayey soils, and appreciate some shade in zones 8 and warmer, so I realize heat is a factor. Yet, I don't believe that is all of it. I have seen healthy specimens in warm locales. Dr. Wilcox suggested that nematodes are the culprit. For the southeastern US, the areas that are zones 9 and warmer are coastal areas and peninsular Florida. The soils there are sandy and such soils support high populations of nematodes. So, naturally, one would be tempted to conclude it's the heat. I want to know how windmills perform in the zones 9 and warmer areas where the soils are not sandy, such as Houston and New Orleans. I suspect that planting a windmill "high" with the root initiation zone a few inches above the soil line in sandy soils helps improve its performance. All the healthy specimens I've seen were sitting high above the soil line. Do you share the same observations? 1 Jeremy Breland Norfolk, Va: USDA hardiness zone 8a, AHS heat zone 5, Sunset climate zone 31 Hot and humid summers; cool and moist winters. Jacksonville FL: USDA hardiness zone 9a/9b, AHS heat zone 9, Sunset climate zone 28 Hot and humid summers; warm and moist winters punctuated by cold spells. Link to comment Share on other sites More sharing options...
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!Register a new account
Already have an account? Sign in here.Sign In Now