Hello CannaMom, domes are only for clones! When you grow from seeds you do not want to use domes because you want the roots to suck up water from the soil and the leaves to evaporate the water so that the roots are able to suck up more water up again. This is nature's way to transport water inside the plant. You should see the water (with nutrients) like a pearl necklace, all the water drips are attached to each other. And the leaves need to evaporate water to stay cool and while evaporating the roots will be able to suck up more water because of the created vacuum inside the plant. Nature is a beautiful thing! Enjoy your grow!