Dendrobium Repotting

Question

I have a large dendrobium orchid that is about 16 years old, which I have repotted several times. Now it needs to be repotted again and divided but there are still open flowers on the plant and a new spike appearing. Can I divide it safely and repot it now or would it be better to put it off for a time? —Jerry Ladiges
 

Answer

In Washington, as in other more northern areas, I would wait until at least mid-April before handling your plant. Cut off any open flowers and also any immature inflorescences immediately prior to repotting. Repot only when new growths are starting. After your divisions have settled in and begun active root growth in their spring growth flush, you can let any new inflorescences remain. I imagine that would be six to eight weeks after repotting. —Andy Easton