No trellising, they're not a climbing vine. Straight up thick stalks. I staked some of them just to keep them from leaning over into the lanes between the beds. Planted on a large scale, that would be impractical. There are only about 50 plants in that bed and for the most part they usually hold each other up.
As a green manure, they create a lot of biomass that breaks down very quickly in a compost heap or tilled back into the soil.
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