Algae on roots?

[CaptFrank]

Some of the roots on my Vandas have a green coating on them. Is this Algae? Can I just leave them alone or do I need to do something about it?

[WhiteRabbit]

I don't think algae hurts the roots, but will see what others have to say about it

[nutgirl]

My Ascoscenda's roots developed are covered with algae. It doesn't seem to bother it other than it looks gross.

This summer it grew new roots and the algae covered ones put out new growth also. It seems quite happy.

I'm betting by next spring the new ones will be covered too.

Maureen

[RosieC]

My orchids that spent the summer either outdoors or in the greenhouse have all developed algae on the roots. On some it's quite thick, on some it's just a little.

I've not noticed any problems with it, and I know that those people who grow in S/H often get it in the pots and Ray has said it does no harm.

[rbarata]

It makes sense to think it helps preserve humidity in the roots, which is good, I think.

[Ray]

Is it algae, or is it moss?

Any time you have a steady supply of water, fertilizer, and light, you're going to have algae, but if it's building up too much, it is likely you're over feeding.