"How to Tell the Temperature by Looking at Your Rhododendron"

"You can tell how cold it is outside by checking the leaves on your rhododendron.

- The leaves begin to cup and curl at 35ºF.
-Half the leaf surface disappears into the curl at 24ºF.
-Leaves curl tightly, turn brownish green, and dangle at temperatures in the teens."*

Can I use this information in Southern California? No. Will it behoove me to remember this information for a temperate day in Norway? Yes. I suppose I first must purchase a large Rhododendron.

The Rhododendron is a must.

*Info from "Ben Franklin's Almanac of Hit Wisdom, and Practical Advice" by the Editors of The Old Farmer's Almanac".