Cattleya watering now that we have new growth

[cluelessmidwesterner]

Spring is around the corner, although here in the upper Midwest Old Man winter isn't showing signs of leaving, and I have new roots and/or growths starting on my three Intergeneric Cattleyas.

I presently am watering their pots only once a week and when they are basically bone dry. (The house is at 30-35% RH even with humidifiers running on both stories of the house.) Should I and if so when should I increase waterings? If someone also could give me a ball park guessestimate on the frequency of increasing it would be great. Two of them are potted in bark mix (one in a plastic, one in terracotta pot) and one just in Leca (plastic pot).