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Catts: Bury the roots in the media
Catts: Leave the roots out in the air as much as possible
Catts: Trim the roots off
Phals: Bury the roots in the media
Phals: Leave the roots out in the air as much as possible
Phals: Trim the roots off
Oncs/Intergenics: Bury the roots in the media
Oncs/Intergenics: Leave the roots out in the air
Oncs/Intergenics: Trim the roots off
This is a discussion on Root Management during Repotting within the General Orchid Culture forums, part of the Orchid Culture category; How do you manage roots during repotting?...
How do you manage roots during repotting?
I don't grow Catts or Phals, but I do bury aerial roots on my Brassias.
In this arid climate, aerial roots don't thrive, so in general, I try to bury roots if I can. I certainly try to guide new roots into the media. Just repotted a phal with an absurd amount of aerial roots; in this case I left quite a few out because that's what the plant was used to. I even trimmed some of the really long dangley ones--that was a first for me!
I try to leave the roots exposed as that is where the plant wants them.With aerial roots ,if they are buried they have a strong tendence to stop growing and the die.
I agree. Especially with phals, the aerial roots die when they are buried in the media, unless the media is very coarse.
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Sorry for offtopic
According to all that I have read, aerial roots should be left in the air. I haven't read about Oncidiums, so no comment.
Overburing roots tend to lead to mushy leaves. You want some exposed. I Usually bury all but the silver roots. So far I have 129 orchids still alive and well.