I have a few palms that are out of zone, but perhaps the most tender that has had some success has been Chamaedorea elegans, this is a zone 10 palm by most accounts. This palm is now going on its 4th winter. It gets damaged every winter, and is in one my gardens most favored micro-climate. It has received very little protection, I throw an old bath towel over it. This is not a long term palm, nonetheless it has been a fun experiment.
What palm are you trying to "push" in your zone with. Do you have a palm you know you have no right to believe it will grow, yet somehow it has stuck a round a few winters (without Herculean protections). Please post a picture and share your story.
This is a picture taken last spring, you can see some damage and some new growth.
Well I know I might be crazy but as soon as spring hits I payed for 2, big takils and I bought a fully mature butia bonetti. I also have some sabal minors and some louisianas going in the ground as well. So ask that question again later next year and ill show you the results.
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I would have to say my most marginal species of palm planted out in the garden is Rhapis excelsa. I planted a 1 gallon specimen in 2001 and it has thrived since then. I have it growing in a west facing L-cove very close to the house. There is also a large tree fern growing beside it. Last Winter and the one before I just layed a piece of bubble plastic over top of it in the cold snap. I have a large clump of ginger growing beside it that looks as green as it did in the Summer. I once had a Rhapis survive for 5 years in the garden, but it died from lack of Summer irrigation when I went away on holidays. The poor little palm dried up. Joe
Growing palms and other exotic plants here in the Southern Gulf Islands.
Would be either my brahea armata (new this winter) or chamaedorea microspadix.
My 3 chamaedorea microspadix survived last winter with very little protection. My low was -6.9C. Not sure what that is in F but it is around 18 to 20 I believe.
I also had a trachycarpus latisectus and jubaea chilensis seedlings survive outside unprotected but close to the house under a soffit.
Wes North Vancouver Zone 8b/9a
Keats Island BC Zone 8a
Palm Springs CA Zone 9b/10a
Wes, -6.9 C. is equal to approx. 19.5 F. Cheers, Joe
Growing palms and other exotic plants here in the Southern Gulf Islands.