Companion Planting & Garden Value: Sunchoke (Jerusalem Artichoke)
Helianthus tuberosus
Spacing: needs about 16 square feet per plant. Mature height: 6-10 ft.
Plant these nearby
No well-established companions.
Keep these apart
- Lettuce: Sunchoke leaf tissue is measurably allelopathic: a controlled study found it cut lettuce seedling root growth by about 60% and tomato's by about 30%. It reinforces the advice already on this plant's own page to give it a permanent bed of its own rather than rotating it with annuals. (source)
- Tomato: The same study that measured sunchoke's effect on lettuce (about 60% less root growth) found roughly a 30% reduction in tomato seedling root growth. (source)
Common pairings, answered directly
- Can I plant sunchoke (Jerusalem artichoke) next to lettuce?
- Better not to. Sunchoke leaf tissue is measurably allelopathic: a controlled study found it cut lettuce seedling root growth by about 60% and tomato's by about 30%. It reinforces the advice already on this plant's own page to give it a permanent bed of its own rather than rotating it with annuals.
- Can I plant sunchoke (Jerusalem artichoke) next to tomato?
- Better not to. The same study that measured sunchoke's effect on lettuce (about 60% less root growth) found roughly a 30% reduction in tomato seedling root growth.
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Companion planting for Sunchoke (Jerusalem Artichoke): which plants to grow next to it, which to keep apart, and the reason behind each pairing.
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