The roots growing on the top of your medium is from your branches growing, these roots grow as far as the branches. They are growing for support cus your plant is getting tall. I posted photos on Flickr of my dwc and what I used was a vinyl mat to cover them from any light. Bayou bud 20011 on Flickr
bayou bud Reviewed by bayou bud on . my first dwc question I would like to know why my roots are growing upward twards the plant and the top of my medium. It's not bad, but the roots will soon be exposed. What's causing it and what do I need to do to prevent it if it will have negative results further down the line? Rating: 5