Brown roots? Strange...
I rescued an onc intergeneric and the roots on the surface all have brown tips. The brownness has even progressed up to half an inch down the root tip (as I observed on many roots). Didn't unpot it, but checked the roots below the bark mix and those roots looked fine. I guess this poor orchid has been fertilizer burned? But if it has been overfertilized, why should the brown
tips occur mostly on roots on the surface of the medium, rather than below the surface as I would have expected? Or is something else wrong with the orchid?
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