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The “a” and “b” zones subdivides it. Zone 10 is tropical, and never gets frost. Each “a” and “b” represents a 5 degree range. You can also create microclimate
by hosh 2y ago
The “a” and “b” zones subdivides it.
Zone 10 is tropical, and never gets frost. Each “a” and “b” represents a 5 degree range.
You can also create microclimates, local areas where the zone effectively shifts up or down about 5 degrees.
As an aside, there is a heat hardiness zone that rarely gets talked about.
- madcaptenor 2y agoYou can find that if you scroll down the article far enough, or at https://ahsgardening.org/about-us/news-press/cool_timeline/heat-zone-map-developed/ https://ahsgardening.org/about-us/news-press/cool_timeline/h... - it's based on the number of days above 86 degrees F (30 degrees C). I would like to see these two maps overlaid on each other somehow.