Walchit said:Did you add vermiculite when you potted up too? Vermiculite holds a ton of water
No vermiculite. The potting mix is coir, compost, perlite, and fertilizer (composted poultry manure, feather meal, sulfate of potash).
Not much perlite, and it's not coarse grade. I think they were not using much water in cool conditions under weak light.