You could well be right, certainly for the greenhouse plant. Not too many sunny days where I live. No fan but I do try to keep a good airflow through the greenhouse by opening all the windows. Have been a lot of dull days lately which I guess slows down the drying rate as you say. Will be moving that indoors once I have the space.My guess would be, your plants aren't drinking a lot of water because they're not getting enough energy to full photosynthesis. Like, it's not recieving a full day of light. Is it just sitting next to the window? You got a fan nearby?
Issues with the indoor 3 may well go way as they grow into the pots I guess. Thanks for the info.