6 responses to “Rhododendron calophytum”

  1. Leslie Reid

    Thank you, Daniel, for your enlightening information. I look forward to your photos. I am a master gardener in Victoria B.C., and am challenging myself to complete the advanced m.g. courses .within the next few years. This site has been informative with excellent photos and information.

  2. Marilyn Brown

    This is a stunning photograph ! I’ve been missing you. So happy you have returned.

  3. owenldn

    In the article it mentions the use of Rhododendron leaves as a weather/temperature gauge- does anyone happen to know what temperature the leaves start to droop/curl and what temperature the leaves go back to their former positions? Would be interesting to find out!

  4. lynn

    Fascinating science, Daniel, and I like your curled rhodie leaves abstract. I’ve also noticed this for years – it’s one of those things you see on a cold day that makes you shiver even more. 🙂

  5. Patrick Collins

    I don’t know how severe the winds are in winter in the native region of these rhododendrons but I imagine they are potentially damaging. If the deciduous canopy is no longer protecting them could it be that the reduced cross-section lowers the wind drag sufficiently to be beneficial to the plant? Are the leaf-stalks still stiff or more loose than when the leaf is horizontal?

  6. Rosemarie Parker

    For at least one explanation for winter leaf curl and orientation, see

    I would swear they curl tighter as the temperature drops below 20 degrees F.

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