sunburnt seedlings

[peter831shaw]

Hello,

first post to this forum, and as you might expect, I need help.

I have a couple of pots of seedlings that turned dark brown under too much light from fluorescent lights.

From what I have read its not a good thing, and they really have stalled out.

They are now in my greenhouse at work in a shady spot with some shade cloth for additional protection.

I have lots of other seedlings that were growing under the same fluorescent light and moved to the same greenhouse and are growing well.

Lophophoria williamsill seedlings.

Will they eventually grow out of this?

[iann]

They don't look so bad. Are they really Lophophora? Odd colour for them to go, maybe you really did give them a lot of light. Anyway, just have to wait now. I don't think your current light levels are killing them but a little less might be better for growth. Some seedlings just go really intense colours at very modest light levels, but still need the light to develop. Again, not Lophophora in my experience. Here is a random L. williamsii picture, grown under lights and a few weeks old.

[jfabiao]

As Iann said, they don't look too bad. A number of things can make seedlings turn that deep reddish-brown colour, namely light, cold and water stress. It's when they turn bright red that you need to worry. You did well to cut back on the light, they will soon resume growth. Here's a picture of some Lophophora seedlings of my own, not as young and red as yours but you still can see how some are really tanned (2" pot).

Lophophora_williamsii_11034_20120127.jpg (388.46 KiB) Viewed 1477 times

[iann]

I still think you've got a pot of perfectly healthy Gymnocalycium seedlings with the wrong label in

[peter831shaw]

thanks, I'll keep my fingers crosses,

Iann, won't be the first time the labels are wrong, the seeds came from a dealer in Germany. I had some seeds from the CSSA labeled Mammallaria and they came up as split rocks

Peter