- Wed Aug 01, 2018 4:49 pm
For my fly trap seedlings, I'd take the cover off completely every day and fan the soil a bit to get full air exchange.
There was always enough condensate, etc. so the humidity around the seeds didn't substantially change. I still got some algae, but I credit that to unrinsed media, and to untested rainwater off our roof that probably picked up millions of spores on the way through the gutters.
Again for fly traps, they take forever to get three or four leaves. D. capensis go faster. Once they first two seeds were up for most of the seeds, I would crack the cover more and more every couple of days. It still kept plenty of humidity around the plants from watering, but also got fresh air in. (I'm also in humid Wisconsin.)