For over 3 years I tested this plant in the ground. The results are in. Camu Camu can withstand below 20°F(-7°C) for over 6 days through a winter and survive with minimal protection, a tree-teepee. The results are all the same in terms of 20°F. The lowest temp is 0°F, with windchill, one lived the other died-last year. This will be repeated several times with other plants now that more are of fruiting age. Those that can withstand the lower temps will be isolated and retested until absolute thresholds are met. This plant, named “Prosper”-not a distinct cultivar just yet, is the first of cold hardy Camu camu plants identified in my collection.
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