Yes, initially the tap root heads straight down towards the res the tells all his fellow roots that he discovered something good then they all flock down there. Once I noticed growth, I started watering the entire pot just as we do in soil because I'm sure the roots have spread out as well as down. I can see bunches of roots thru the water hole.

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Kali Mist/Colombian Red Haze journal

Here's my last grow AK47 and PPP in hempy journal