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.