yellow leaves

[radhasrikanth]

hi all,
one of my dndrobium leaf has turned yellow color and for black spots on cattaleya plant.here is the pic of the leaf and balck spots.help! please!

[Kmac]

Is the den leaf that turned yellow an older leaf? How does the rest of it look?

[espranch]

Radha...First, throw the yellow leaf away, and do not panic! The plant looks like it's a good color of green, and all plants lose leaves ( they usually turn yellow first ) Now,please get a close up pic. of the black spots that you're talking about and post it so that we can get a good look at "what" is happening. Then we can better help you/the orchid. Thanks, Betty :-)

[radhasrikanth]

hi katie,
thanks for that i have added a closeup view of the cattelya and another dendro has the same yellow leaves.

[Kmac]

Radha--

The catt spot looks to me like it is probably sunburn or physical damage, so I think it's probably fine.

The dendrobium--they all lose lower leaves from time to time, but since yours has already lost one, and now has 2 more turning yellow, you might check and see if the roots look healthy--I am wondering if it may have stayed too damp too long, and had some root damage. I had one like that this summer, and it turned out that the old bark it was in had broken down and was retaining too much water. I re-potted it in fresh media and it started looking better & putting out new growth soon after.

Good luck!