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Help with damaged Brassolaelioc rustic spot cat

14 years ago

This Cattleya was doing fine until I re-potted it about two weeks ago. I cleaned out a lot of dead roots. We just went through some very cold weather which probably stressed the plant anyway. I just noticed that there is a brown blister on a leaf and the leaves are turning very purple. I lost a few.

Any suggestions of what that blister is? I attached a link below but will try to post the picture. Thanks

http://photos.gardenweb.com/garden/galleries/2010/03/brassolaelioc_rustic_spot_cat.html

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Comments (4)

terpguy
14 years ago
Sun damage. The purple is a sign that the plant is receiving the upper limits of its light tolerance...a sort of suntan. This is a good thing under most circumstances. I encourage this coloring on any plant I have the produces it. The brown blister is where the sun got a little too intense. Its pretty easy to make a mistake with light this time of year. The light is currently getting more and more intense through the windows. If you can reduce the light just a little bit, that will help keep the purple tint but not be strong enough to burn the leaves.

I do suspect this came about as a result of your repotting. When you repot, the resulting stress on the plant is such that the plant can't tolerate its normal amount of light. So for a few weeks after repotting its good to keep it in lower-than-normal light and gradually work the plant back up to the normal light intensity as it gets established. I'll admit I don't do this; I'm impatient and just put my plants back in their regular light. For the most part I don't have any problems but there have been one or two plants that have had this repotting sun damage.
arthurm
14 years ago
This orchid needs high light to flower, but when you did the repotting perhaps you should have placed the plant in a more shaded situation so it would recover from disturbance to the roots etc.

Your my-page details just say United States and you do not give growing situation details, but in some places direct sunlight would be too harsh even for this orchid.
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little_bee
Original Author
14 years ago
I live in South Florida. The sun hasn't been to strong, especially with that cold we had come thru. It is in a North west corner with morning sun then filtered sun after about 2 - 3 hours. I don't like that brown blister I'm seeing.

Thanks.
terpguy
14 years ago
LOL You should see my orchids. Maybe 1/3 of them have some sort of sun damage/blistering; doesn't bother me in the least. I push the upper light limits of all my plants. Really, the blister is just a sunburn. Nothing to worry about; it won't spread and kill your plant. Just ease up on the light slightly and it'll be ok :)

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