Coelogyne barbata Lindl. ex Griff. - Orchid Board

RoseSD · #1 03-14-2022, 12:30 AM

My Coelogyne barbata has grown a healthy spike but its older pbulb appears to be rotting (brown part feels soft). Is it worth cutting it out to prevent the spread of infection?

estación seca · #2 03-14-2022, 12:53 AM

I wouldn't. Coelogynes tend to drop old pseudobulbs and they go soft. You can gently tug; it might come off. If it doesn't, don't tug too hard.

RoseSD · #3 03-28-2022, 10:30 PM

Quote:

Originally Posted by estación seca

I wouldn't. Coelogynes tend to drop old pseudobulbs and they go soft. You can gently tug; it might come off. If it doesn't, don't tug too hard.

You were right about Coelogynes' "going soft" tendency. They are so strange!
Orchids are cool.

---------- Post added at 07:30 PM ---------- Previous post was at 05:57 PM ----------

Quote:

Originally Posted by Roberta

I just was out looking at my plants... I see Coelogynes with brown (rotten looking) p-bulbs in the middle of good ones. I think you can safely pot it back up... roots look good, so it's likely doing what comes naturally and not spreading into the new growth

---------- Post added at 05:55 PM ---------- Previous post was at 05:53 PM ----------

Don't cut. I think that both of the browning p-bulbs are just reacting to having been divided. Roots look good, pot it back up. And leave off the sphag

Are you giving yours a lot of light or more shade? I read from a source "Coelogyne barbata loves bright sunlight and is able to tolerate direct sunlight (50000-70000 lux),", yet, on Andy's page he said it needs "Shade to Bright; 1500-2500 Footcandles (indirect light,pronounced shadowing)". Very confusing.

RoseSD · #4 03-14-2022, 02:00 AM

Thanks.

RoseSD · #5 03-28-2022, 05:06 PM

First pBulb has turned completed brown and second pBulb started to turn too.
Is this still normal?

Roberta · #6 03-28-2022, 07:56 PM

Does not look so good., My first thought would be to unpot and see what is going on with roots. Surgery might be needed, but don't do it "blind". Look at the whole plant first.

Do you have it completely in sphagnum, or just a sphagnum top dressing? I grow my Coelogynes mostly in baskets, or if in pots, then just bark and perlite.

RoseSD · #7 03-28-2022, 08:02 PM

Moss used as top dressing only.
It is in spike now though.

RoseSD · #8 03-28-2022, 08:17 PM

New root growing.
Where do you suggest I cut?

Roberta · #9 03-28-2022, 08:25 PM

Is the new root coming from the new pseudobulb or the old one? If from the old one, leave it and just watch. You could remove the completely brown one though. If the new root is coming from the new pseudobulb, you can still leave the browning one...is it squishy (like rotten) or just drying out?

---------- Post added at 05:25 PM ---------- Previous post was at 05:23 PM ----------

By the way, when you repot, skip the sphagnum. The plant doesn't need or want it.

RoseSD · #10 03-28-2022, 08:26 PM

Quote:

Originally Posted by Roberta

Is the new root coming from the new pseudobulb or the old one? If from the old one, leave it and just watch. You could remove the completely brown one though. If the new root is coming from the new pseudobulb, you can still leave the browning one...is it squishy (like rotten) or just drying out?

This is the interesting part. Most new roots are under the spiking shoot, but one is growing directly under the first rotten pbulb. What does that mean? The rhizome is not soft but is dark.