I moved under MH lights a few months ago. The plants are responding great however the top of CH medium dries our really fast. Does anyone have a solution for this?
Thanks-
Phil

I usually water a little more frequently. My plants do dry out quicker under the HPS.

Make sure your air humidity stays up to 60 - 70%.

Compensating for low air humidity by increased watering can promote root rot.

Per someone's suggestion a long time ago, I put a layer of sphagnum moss on top of my chc, helps keep things a bit moister, at least it makes me think it does :-)