We use Kaolin clay in the pear orchards. It is used for sun protection and it is a deterent against coddling moths.

I would try it because it is a clay so wouldnt hurt. It is sold under the trade name Surround.

It might have some other advantages so let us know.

Fascinating.

Yes, please report back on how the roses do.

From Wikipedia:

“Certain kaolin-based sprays can form a highly reflective white film over plant surfaces that is known to enhance plant photosynthesis and reduce heat stress in plants, which they do by reflecting the infra-red light spectrum, which in the end improves plant yields and fruit quality in orchards.”

Not just permits photosynthesis. Enhances it.

!

I appreciate the encouragement. Maybe I'll apply on some and not others to better see any differences.