archontophoenix c Archontophoenix cunninghamiana

[ExperimentalGrower]

Vallejo, CA, (USDA Zone 9b/Sunset Zone 17) Advective freeze last night, with frost. Dew point hovered just below actual temperatures during the coldest hours. Humidity was considerably high for an event like this in Northern California. Generally during similar cold events humidity levels out in my area are consistently quite low. ~70% damage on horizontally exposed leaves. This is a juvenile 5 multiple clump planted last July 4th, 2020 so a pretty dense set of leaves packed into a small area, which coincidentally results in some leaves being exposed and damaged, and others protected and damage free. This clump is under wide open sky near a west facing wooden fence, less than 20 ft from the south facing wall of my house. Somewhat surprised this much damage occurred at those temps but it was advective with frost, on a plants that have been in the ground less than a year so ya...