Companion Planting: Cucumber

Cucumis sativus

Spacing: 2 per square foot. Mature height: 5-6 ft.

Plant these nearby

• Bush Beans: Beans fix nitrogen that heavy-feeding cucumbers use.
• Radish: Reputed as a trap crop for cucumber beetles, but the documented trap-crop research for cucumber beetles points to Blue Hubbard squash specifically, not radish. Radish IS a real, documented trap crop, but for flea beetles on brassica crops — a different pest and crop pairing than this one. Treat this specific pairing as garden tradition, not measured evidence.

Keep these apart

• Kale: Aromatic brassicas can slow cucumber growth.

Common pairings, answered directly

Can I plant cucumber next to bush beans?

Yes. Beans fix nitrogen that heavy-feeding cucumbers use.

Can I plant cucumber next to radish?

Yes. Reputed as a trap crop for cucumber beetles, but the documented trap-crop research for cucumber beetles points to Blue Hubbard squash specifically, not radish. Radish IS a real, documented trap crop, but for flea beetles on brassica crops — a different pest and crop pairing than this one. Treat this specific pairing as garden tradition, not measured evidence.

Can I plant cucumber next to kale?

Better not to. Aromatic brassicas can slow cucumber growth.

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

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