How many old leaves is normal for a phal to drop at one time?

[Maru777]

Hello guys,

Need a bit of help please! I thougt that I was doing quite well with my phals. Had them since Feb. They’ve been growing nice new leaves and roots like they’re trying to take over the world. They looked pretty happy, but now 2 of them started dropping leaves. At first I was not worried because it’s the bottom ones so that should be normal but one is dropping the 3rd one already And the other one looks like it wants to drop 3 as well and all at once. The others I have only lost 1 each in the same time-span. Is this normal? Am I missing somehing? I added a picture for each of the 2 plants that worry me. They share a coffee table on my porch too so I’m worried if something got to one it will get the other.

[orchidsarefun]

A phal wouldn't normally drop green leaves ( if they turned yellow first, that's normal ). It's never happened to me and I've grown then in all sorts of temperatures and conditions. They look fine to me. It may be a fungal infection? Read this
Why Is My Orchid Losing Leaves - What To Do When An Orchid Is Dropping Leaves

[Maru777]

They’re turning yellow first. The one with fewer leaves had 2 more before but first one turned yellow and then the other and they came off. Now the bottom one is changing colors too and I’m sure it will follow the other 2. What worries me is they dropped no leaf since Feb when I got them and now in 2 weeks it’s bye bye 3 leaves
I’ll definitelly read the link you added as well. Thank you!

[King_of_orchid_growing:)]

Try growing the one on the left drier and with a different potting medium.

Watch the one in the right photo and see how it progresses, but otherwise, this one I wouldn't be as concerned about.

[aliceinwl]

Check the stem too. I recently had one of my Phals develop a case of stem rot. I didn’t notice anything until it suddenly dropped three leaves.