Some folks say it can’t be done in the grobo, but I’m in week 3 now and at this rate by week 5 my manifold will have just started. Got my supports in place and ready to start. I don’t see a logical reason this wouldn’t work in the grobo. I don’t think space will be an issue as suggested even pushing it with 8 colas which would be the max imo. I’ve measured my soil manifolds and it shouldn’t be an issue. Either way it will be a fun experiment! As soon as I get to 5 nodes I’ll post before and after pics.