too much light?

by Kathryn Stewart
(La Mision, Rosarito, Baja California)

Sempervivum 'Royanum'

Sempervivum 'Royanum'

I'm in a Facebook group where someone posted 2 pix of their sempervivum royanum five weeks apart. She said she uses a grow light. The 1st pic shows a small plant with dark green leaves that are red tipped. The 2nd pic shows the plant is much taller with pale green leaves that are much slimmer. Is this sort of growth normal, or has she used too much light? Thank you for your input.

Comments for too much light?

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Nope, not enough
by: Jacki

Sempervivum need a lot of light. They originate high up in alpine regions where the air is a lot thinner than at sea level, so the ultraviolet light is a lot more intense. Grow lights are good for the short term, but the plant has to be right underneath it, which most people don't do - they want to see the plant, after all.

The thinner, stretching leaves are the dead giveaway. This is called 'etiolating' and that's what it means - stretching to reach more light.

There would be almost no case where you could give a Sempervivum too much light.

The other thing is that Sempervivum NEED a cold winter dormancy. They are not good indoor candidates. The plant will never recover its normal shape unless it gets back to its required conditions.

Having said all that, it's totally normal for Sempervivum to change color with the seasons - that's one of the reasons they're so fascinating!

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