Tolumnia - best time, or not, to repot

[Paphluvr]

Is there a best time, or absolutely do not repot time, for tolumnia? It seems to me that it doesn’t have a rest period.

 

[big923cattleya]

I think that Tolumnias prefer not to be repotted. They do not like their roots disturbed. I understand that they do not mind growing out and over a pot. Root systems prefer to be wandering, unconfined if you will.
Many people here grow them in small clay pots without any potting material at all.
It is important for them to dry out quickly.

 

[CarlG]

In general, the best time to repot any orchid is when the plant is actively making new roots, and those roots are long enough to not have their tips broken off, but short enough to again avoid damage from potting stuff.

As far as tolumnias go, I don't grow them, but my understanding is that they really want their roots exposed to air.

 

[Paphluvr]

When I had higher humidity and better air circulation (i.e., under lights in a dedicated grow room with humidifier and circulation fan) I grew them mounted, but now that they’re grown in my living area neither the humidity or air movement is ever ideal.

 

[Happypaphy7]

I'm not sure about absolutely no repot period, but as Carl says above, it is best to repot any plants when they are actively growing or just started growing roots.
Many things said about orchid growing is just old saying that is not really accurate and the same goes about Tolumnia.
I used to have a bunch of them, all were purchased potted in tiny clay pot with almost no mix or a few bark chips in.
I potted them all in 3.75inch pot with my usual mix (bark or orchiata with some inorganic like lava rock or charcoal chips). I never had issues and I had less than 40 relative humidity except for the summer time. They were always either blooming or growing leaves and roots.
I never found them fussy or difficult at all.

 

[Linus_Cello]

Hopefully Mike and/or sky7bear will weigh in:

https://www.slippertalk.com/threads/tolumnia-golden-sunset-lisa.47799/#post-671047

 

[Ray]

Since moving to coastal NC, where both temperature and humidity can approach triple digits all summer, growing them, mounted on a piece of wood (I have been successful with well-cleaned driftwood and cedar slabs sold for grilling salmon) is like falling off a log.

Winter, indoors, is a whole other situation that has led to depleted plants, if not outright springtime plant replacement.