Too much sun for this Catt. or deficiency?

[Kasiopea]

Originally Posted by isurus79

Honestly, I think this is a bad idea. There's a good chance that you'll end up killing the healthy side with only a marginal chance to perk up the sick side. Florida is already crazy humid and cutting off air circulation is only used as a last ditch effort to heal plants with no roots. It is a very efficient way to kill orchids that don't need such treatment. You'd be better off leaving the healthy side alone and doing spag n bag with the sick side in a separate pot.

Yea, I can see what you are saying. I'm just noticing how fast things get bone dry here in FL, the bag is open on the bottom and is just an attempt to hold a little extra moisture in. But your right the new growth should do fine from here, and the not so much alive chunk should be treated separately. I'll be monitoring, how they do, n probably split them when I find a moment.

Here's a pic of the new one I got dry root. I moved it inside to the patio now. Maybe it's like a moisture retention ability vs heat issue. Seems like the weaker plants are prone to this heat damage. Tho two others I got same day also dry root, are doing fine on the same spot.

[NYCorchidman]

Originally Posted by tucker85

Many of my cattleyas have red on the leaves and, as long as the leaves don't burn, I don't worry about it. You said you use a bloom booster fertilizer. I would recommend that you not use a bloom booster during the spring and summer. The high phosphorous can block other nutrients from being absorbed. I would recommend Southern Ag 16-3-16 6 Ca 3 Mg from Broward Orchid Supply in Hollywood, FL, or Norman's Optimal Orchid Nutrients mixed with MagiCal cal/mag supplement. You can get both those products from Green Barn Orchid Supply in Delray Beach. I recommend that you buy the book Florida Orchid Growing by Dr. Martin Motes. It's very specific to growing in Florida. Also there are many great orchid societies in this area. I belong to the Ft. Lauderdale Orchid Society and the Plantation Orchid Society. There are other societies in Sunrise, Davie, Pompano Beach, Margate and on and on.

Wow~ orchid hobby must really be very big down there.
I used to visit Plantation, Sunrise, Davie on a regular basis, but never realized it, although one friend somewhere in Ft. Lauderdale did have a large blue vanda hung on the palm tree in his backyard.

[isurus79]

Kasiopea,
Don't forget, Cattleyas need to dry out completely between waterings! Bone dry is not so bad!

[daddydoall]

Dehydration, roots are out competed or otherwise not working. Definitely remove and repot if you want to try to save it.
The deficiency and sun excess does not make sense since similar plants in same pot are fine.

[BettyE]

Originally Posted by DavidCampen

It is borderline too much sun.

I agree with David...this orchid is getting all the sun/light it can tolerate. Any more, and the leaves will burn! Been there, done that. BettyE.