I ended up putting the sprouted fava beans in a pan of water, instead of discarding them after the mini-germination test, and put the pan on a south-facing windowsill. A few days ago, a little natural selection happened: the pan got knocked to the floor, and the kinda brittle main root snapped on three of them, leaving only the biggest, healthiest one in one piece. I put it back in the pan… Amazing what a plant can do, in a few days, with nothing but water and some sun. Tiny hydroponics!
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