cushmasternewbie Active Member Feb 9, 2015 #1 What purpose does it serve to cover top of plant but leave hole where your plant grows out
J jay719 Active Member Feb 9, 2015 #2 When the water evaporates, it condenses on the inside of the lid and drip back down. The effect is that it decreases evaporation and helps keep the medium more evenly moist.
When the water evaporates, it condenses on the inside of the lid and drip back down. The effect is that it decreases evaporation and helps keep the medium more evenly moist.
Mad_Prophessor Well-Known Member Feb 9, 2015 #3 You wont see something like that in a commercial grow. It is a gimmick and a waste of money IMO.