Wednesday, December 24, 2008

Rhododendrons, minus 8

Rhododendrons generally grow quite well here in the acidic soil. They don't much like the really cold temperatures, though, and below about minus 2 the leaves begin to curl tightly. The curling maximizes at about minus 8 Celsius, as shown here. In between, the amount of droop-and-curl correlates pretty well with the weather and is a useful gauge of the temperature.

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