I feel like this is kind of a loaded question. 50% - 60% humidity is passable but higher humidity in early development is almost always better for overall plant health in that early stage.
Okay. 50% to 70% is fine. If he can only do 50 to 60 without the dome isn’t that okay?
What’s better, leaving the dome or removing it?
Obviously high humidity environments present their own problems but I think with proper air circulation and cleanliness protocols those problems can be minimized and managed and still be able to provide the best environment for our plants to thrive in.
True. But this is simply so he can remove the dome without worrying his humidity is to low. Nothing more.
My early seedlings through early veg get humidity levels averaging around 70% - 80% consistently and, so far, I haven't had any mold or mildew issues.
Excellent. Totally different scenario from OP. He has sprouts about 1.5” in a dome with mist all over the sides.
I’m not even worried about mold at this point. Just all the water.
I'm currently in week 2 of flower and the humidity in the tent hasn't gone below 60% throughout and has spent most of its time in the 70% - 75% range.
I’m glad you found your zone and it’s working for you.
Would you recommend all people in their second week of flower keep humidity at 75%?
I'll start lowering the humidity after week 6 but moreso to stress them to produce the desired effect rather than any issues with disease or pests.
I try to keep things simpler for beginners and myself.
Again. This was simply a reassurance that removing the dome and going between 50% and 60% humidity isn’t a major problem.