Growing Cattleyas under PAR38 - Orchid Board

Mor · #1 02-13-2015, 07:28 AM

so everything seems to be fine with the ALT Par38 bulb except of my purple Catt. Her leaves turned purple! And I mean that all the leaves turned really purple! It's not only the tips.. I attached a photo. Is it bad?

Is anyone think that high level of artificial light can harm low light growers? They can't burn in any way because of the leaves temperatures, right?

Thanks!!
Mor

Mor · #2 02-13-2015, 07:31 AM

Another photo

ALToronto · #3 02-13-2015, 07:49 AM

Completely normal. It's getting plenty of light, and the purple coloration (anthocyanin) is a normal response. It's like suntan on people - if you shade a portion of a leaf, you will have a light green spot the size and shape of the shaded portion.

In the wild, some cattleyas become much more purple than yours.

Subrosa · #4 02-13-2015, 08:05 AM

Quote:

Originally Posted by Mor

so everything seems to be fine with the ALT Par38 bulb except of my purple Catt. Her leaves turned purple! And I mean that all the leaves turned really purple! It's not only the tips.. I attached a photo. Is it bad?

Is anyone think that high level of artificial light can harm low light growers? They can't burn in any way because of the leaves temperatures, right?

Thanks!!
Mor

That's a tan, not a burn.