Can I plant asparagus next to tomato?

Yes. Asparagus roots contain asparagusic acid, shown in lab studies to be nematicidal against root-knot nematode, a real threat to tomato. The classic pairing has real chemistry behind it, though the studies test the extract's effect on the nematode directly rather than measuring an outcome from interplanting the two in a shared bed.

Companion Planting & Garden Value: Asparagus

Asparagus officinalis

Spacing: needs about 4 square feet per plant. Mature height: 4-5 ft.

Plant these nearby

Tomato: Asparagus roots contain asparagusic acid, shown in lab studies to be nematicidal against root-knot nematode, a real threat to tomato. The classic pairing has real chemistry behind it, though the studies test the extract's effect on the nematode directly rather than measuring an outcome from interplanting the two in a shared bed. (source)

Keep these apart

Nothing it needs to be kept away from.

Common pairings, answered directly

Can I plant asparagus next to tomato?: Yes. Asparagus roots contain asparagusic acid, shown in lab studies to be nematicidal against root-knot nematode, a real threat to tomato. The classic pairing has real chemistry behind it, though the studies test the extract's effect on the nematode directly rather than measuring an outcome from interplanting the two in a shared bed.

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

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