Hiya Mr.Salvage. Sorry I didn't see this sooner. The piping is actually just electrical conduit. 1/2in dia? I dress each container at the beginning of the season with a cup of 10-10-10 as a perimeter, adding CaNi weekly. And then towards the end, I'll supplement with Masterblend fert. added to the rainbarrel. The plumbing for this system is so easy and awesome! I highly recommend!
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Subirrigated Container gardening (RGGS) in NY, Zone 7!
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