Hi DARKSIDER. I water from the bottom when I have the time to do it. After they have been standing and soaked with water for a few hours, they are vere satisfied. There is no other reason. When they pack the tent, I will water from the top.Coming along nice Paddi.. i see you water from the bottom .. i do this with my mother plants, as i covered the top layer of soil with vermiculite is there a reason why you do it this way. any advantages or just easier ?. Cheers Paddi.