Newly mounted dendrobium lindleyi heat damage - Orchid Board

JwAllen · #1 05-17-2016, 09:32 AM

Hello all! This is my first post on this board. I usually stalk around and find the answer to my questions in pre existing threads but I can't seem to find the answer I'm looking for to this one. I recently purchased a beautiful Den. Lindleyi and decided to mount it on a cork slab. I placed it among a few Cats and made the mistake of exposing the plant to too much sun. I moved it into a more shaded area but all of the leaves but 1 yellowed and fell off. Should I leave it alone and treat it normally to see what happens or should I repot it back to it original pot for better results? Thanks - Jeremy

Subrosa · #2 05-17-2016, 09:48 AM

I don't know what to tell you about saving your plant, but I can tell you that mine takes full sun outdoors all day long in SE PA after a gradual acclimation from indoor winter lighting. And the indoor lighting is very intense as well. I think your problem arises from a sudden increase in intensity, not from simply too much light.

cjm3fl · #3 05-17-2016, 11:02 AM

My Denbro's receive a lot of intense, yet indirect, sunlight in central Florida. And they do get some direct Florida sun for a few hours each day, April thru November.
But they always have.

I think (dangerous territory) that you shouldn't be too concerned as long as the cane/stem doesn't start to look all wrinklely.
My old canes drop their leaves to begin their rest period...or as a prelude to new plant (keiki) growth.

I don't know what kind of Denbro your is and can't look it up cause of HUGE internet issues on my end.

Keep an eye on it, if roots look too dry maybe soak it for a little while, but if you want it to get more sun..move it gradually to acclimate it better.

silken · #4 05-17-2016, 11:10 AM

I looked up this plant in OrchidWiz. It is a high light plant (3500 to 4000 fc). But it maybe needed to adapt to its new mount before being put under that much light. It also needs high humidity if mounted and may have got too hot as well. OW recommends mounting with a bit of a moss pad. So I wouldn't disturb it again. Sounds like the only time it should be re-potted or disturbed is after blooming. I would just back of the heat and light and make sure it is watered well daily and has decent humidity. Maybe use some seaweed in the water, if it is lacking in roots.

voyager · #5 05-17-2016, 11:21 PM

From the shape and consistency of the PBs and leafs of the Den. lindleyi, it gives every indication of having a high light requirement. But as it has been said above, if it has not been exposed to high light conditions it may be sensitive and need to be acclimated. With that said, I have found these particular orchids to be very prone to sulking when their conditions change, including lighting and everything else. I just posted a pic of mine that has just bloomed here:
My newest Wave of Bloomers

The whole plant is composed of 3 different plants.
Then one in the lower LH portion of the mounting sulked for over a year before it has finally begun to grow again. It dropped almost all its leaves. The PBs shriveled up. I thought it was dieing. It is now beginning to show signs of growing again.

estación seca · #6 05-18-2016, 01:06 AM

Jeremy, welcome! It is growing season, and I think your plant will be growing soon.

JwAllen · #7 05-19-2016, 09:06 AM

Thanks for the welcome and the great advice everyone!

Quote:

Originally Posted by voyager

From the shape and consistency of the PBs and leafs of the Den. lindleyi, it gives every indication of having a high light requirement. But as it has been said above, if it has not been exposed to high light conditions it may be sensitive and need to be acclimated. With that said, I have found these particular orchids to be very prone to sulking when their conditions change, including lighting and everything else. I just posted a pic of mine that has just bloomed here:

The whole plant is composed of 3 different plants.
Then one in the lower LH portion of the mounting sulked for over a year before it has finally begun to grow again. It dropped almost all its leaves. The PBs shriveled up. I thought it was dieing. It is now beginning to show signs of growing again.

That's a beautiful plant! My plant is retaining one leaf and luckily it's the leaf on the newest pseudobulb. The roots look healthy.

Quote:

Originally Posted by silken

I looked up this plant in OrchidWiz. It is a high light plant (3500 to 4000 fc). But it maybe needed to adapt to its new mount before being put under that much light. It also needs high humidity if mounted and may have got too hot as well. OW recommends mounting with a bit of a moss pad. So I wouldn't disturb it again. Sounds like the only time it should be re-potted or disturbed is after blooming. I would just back of the heat and light and make sure it is watered well daily and has decent humidity. Maybe use some seaweed in the water, if it is lacking in roots.

Thanks for the advise! I added some moss around the base of the mount. It does still dry out daily here in central Florida.

estación seca · #8 05-19-2016, 08:03 PM

Your plant might be complaining about lack of water rather than excess sun. On a mount you will have to water once or twice daily, and isn't this your hot dry season?

Has it begun making new roots? My experience with a seedling jenkinsii, a close relative, is that it didn't make new roots until it warmed up this spring, but the plant was not happy if I forgot to water it - or even soak it overnight from time to time.