Your first post didn't say Dendrobium so I wasn't sure what you were asking about.
I don't have any experience with these. Maybe one of the Dendrobium growers will chip in. Meanwhile, here is what the American Orchid Society says:
Dendrobium Culture
Begin Quote from American Orchid Society
FORMOSAE (Nigrohirsutae Type) Canelike pseudobulbs, with black hairs on leaf sheaths and pseudobulbs often apparent, leading to the popular name nigrohirsutae. Flowers usually white, up to 4 inches across, two to three together from near the end of the pseudobulb. Long lasting. Species such as Den. bellatulum, Den. dearii, Den. draconis, Den. formosum, Den. infundibulum, Den. lowii, Den. lyonii, Den. margaritaceum, Den. sanderae and Den. schuetzii.
Culture: Intermediate to cool year round, 50 to 60 F nights, maximum 85 F days. Water and fertilize when growing; give a slight short rest (dry) when growth is completed. Keep barely moist until growth starts again.
End Quote from American Orchid Society
If I had your plants and this were all I had to go on, I would spritz the new roots with water every day or two until growth begins in earnest, then water more heavily. If FrostyMaree 'Orange' is also sprouting new roots, I would repot it now. It will probably need sturdy staking until it's established.
Formosae new growth
Linear Mode
