Epilaeliocattleya winter rest?
 

I have this Eplc which is a crossing of Ctt Gold Digger and Epi stamfordianum.

I'm confused about the culture. This is mostly 50% Epidendrum stamfordianum and 25% Guarianthe aurantiaca. My understanding is that both species require a winter "semi-rest" but I have difficulty understanding what is semi-rest as opposed to "full rest" and when to resume more frequent waterings.

In Orchids such as Catasetinae growers recommend to withhold waterings until the new roots are several inches long. My orchid has green tipped roots, but I'm concerned about being too eager to start watering before spring officially starts in March.

I don't personally like to let my orchids go bone dry, my Cattleya hybrids and Brassavola are kept moist, never dry, never wet. I grow them all, including the Eplc, in baskets with a mix that I try to keep at 50% Orchiata (size Power), 25% Grodan cubes (Rockwool), 10% LECA, 10% Coarse Charcoal, 5% Perlite #3.

Perhaps you can just cut back or stop fertilizing for the month and keep watering as usual. I would consider that a 'semi rest' :)

Catasetinae are fairly unique in their culture so i wouldnt emulate that for anything in the Cattleya alliance.

I question whether it needs it at all, but Louis_W makes a good point: "winter rest" is more about withholding nitrogen than water.

If you look at the plants that seem to require such rest periods, catasetinae seem to be somewhat unique in their need for "dry". I am not aware of anyone growing them in S/H culture (there might be some), but folks growing other stuff that way often achieve the "rest" phase through no feeding and lower temperatures without stopping watering.