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1.
▲
What elements does a plant need to grow?
github.com/hydromisc
102 comments
5 years ago
lathyrus_long
339 points
2.
▲
Show HN: Open hardware for hydroponic automation (EC, pH, irrigation, etc.)
github.com/hydromisc
1 comment
5 years ago
lathyrus_long
10 points