Can I plant lima bean next to sweet corn?

Yes. The same three-sisters mechanism as bush beans: a pole lima climbs the stalk and fixes nitrogen corn uses. WSU Extension's review confirmed the mechanism for common beans specifically, not lima, but both are nitrogen-fixing Phaseolus climbers, so the extrapolation is a reasonable one, not a tested one.

Companion Planting & Garden Value: Lima Bean

Phaseolus lunatus

Spacing: 4 per square foot. Mature height: 1-2 ft.

Plant these nearby

Sweet Corn: The same three-sisters mechanism as bush beans: a pole lima climbs the stalk and fixes nitrogen corn uses. WSU Extension's review confirmed the mechanism for common beans specifically, not lima, but both are nitrogen-fixing Phaseolus climbers, so the extrapolation is a reasonable one, not a tested one. (source)

Keep these apart

Nothing it needs to be kept away from.

Common pairings, answered directly

Can I plant lima bean next to sweet corn?: Yes. The same three-sisters mechanism as bush beans: a pole lima climbs the stalk and fixes nitrogen corn uses. WSU Extension's review confirmed the mechanism for common beans specifically, not lima, but both are nitrogen-fixing Phaseolus climbers, so the extrapolation is a reasonable one, not a tested one.

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Companion planting for Lima Bean: which plants to grow next to it, which to keep apart, and the reason behind each pairing.

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