Not sure if you are looking for a guide to building one or to buy an already made unit. That one looks like it could easily be built from PVC pipe and fittings from the local hardware store.
There's builds posted here that are very similar to that.
Ya I was planning on building one, but those 3" pvc wye pieces are around 3 bucks each!! Has anyone built one like this? i've seen the octagon shaped pvc ones but not up and down like these columns.
You don't have to use wyes. Long pieces of pvc would work fine. You can use a 2" hole, and neoprene covers. Only thing left would be a support system for the plant.
I've also seen one where they didn't use the wyes and just drilled holes into the PVC for the net pots. Cutting the corner of the pot allows them to tip upright a little.
exactly what i was looking for squirrel. you da man!
I thought about just using straight pvc pipe but I was worried about leaks. I really want to try this vertical setup but i'm worried about how much it will cost to operate