Saturday, October 4, 2014
Posted by Becky Brinkman
Orchids that are flourishing don't generally appreciate the root disturbance that repotting can inflict. Stanhopeas are no exception. We repot when: 1) The plant has overgrown the pot; 2) The medium needs to be replaced, either because it has deteriorated -after about two years- or because it is inappropriate for our growing conditions; or 3) The plant is in trouble. Signs of trouble include desiccated leaves and shriveled or rotting pseudobulbs.
The stanhopeas above, which we received last week from Andy's Orchids, fall into the second category. Andy grows his stanhopeas in a medium that works well for him, but turns to mush in our greenhouses during our hot & humid summers.
We repot our orchids when the new roots and shoots appear. For most stanhopeas, that's in late summer and early fall. In the photo above, you can see the new shoot on the Stanhopea graveolens in the foreground. Now is the time!
We use this same potting medium and technique for many of our tropical epiphytic orchids -other Stanhopeinae, Pescatorea and other Zygopetalinae, Brassia and many other Oncidiinae, many Dendrobium, Lycaste and Maxillaria species. All the materials above are available online.