They look nice and healthy. I don't see any reason not to fertilize along with your other orchids at this point.
Here are my two pots. The one on the right, with the ginja leaves, has been inside in my garage, but is now in the house in a sunny window. The other has been outside all winter. My medium is a mix of succulent mix and about 1/4 sphagnum broken up. I did put a bit of osmocote in the pots too. I'm aiming for bigger tubers this year, as most of mine were pretty small compared to the originals. This pic was taken 10 days ago, so they have grown a bit now.
Last edited by fishmom; 04-17-2017 at 01:14 AM..