It will grow both vertically and horiziontally from the slate. How much and how fast depends on your tank conditions. I've had riccia grow 3 or 4" away from the rock it was netted to.hi all been a long time since ive been on here...
well ive started i planted tank again and stumbled across ricca..
i just want to know if i were to place it over slate but leaving gaps between, would it all fill in?
i.e horizontal growth?