Can I plant hollyhock next to nasturtium?

Yes. Planted at hollyhock's base, reputed to help suppress hollyhock rust, but no research or extension source was found testing this specific pairing — treat it as garden tradition, not measured evidence.

Can I plant hollyhock next to garlic?

Yes. Planted at hollyhock's base, reputed to help suppress rust via antifungal root secretions, but no research or extension source was found testing this specific pairing — treat it as garden tradition, not measured evidence.

Companion Planting: Hollyhock

Alcea rosea

Spacing: needs about 5 square feet per plant. Mature height: 5-9 ft.

Plant these nearby

Nasturtium: Planted at hollyhock's base, reputed to help suppress hollyhock rust, but no research or extension source was found testing this specific pairing — treat it as garden tradition, not measured evidence.
Garlic: Planted at hollyhock's base, reputed to help suppress rust via antifungal root secretions, but no research or extension source was found testing this specific pairing — treat it as garden tradition, not measured evidence.

Keep these apart

No known antagonists recorded for Hollyhock.

Common pairings, answered directly

Can I plant hollyhock next to nasturtium?: Yes. Planted at hollyhock's base, reputed to help suppress hollyhock rust, but no research or extension source was found testing this specific pairing — treat it as garden tradition, not measured evidence.
Can I plant hollyhock next to garlic?: Yes. Planted at hollyhock's base, reputed to help suppress rust via antifungal root secretions, but no research or extension source was found testing this specific pairing — treat it as garden tradition, not measured evidence.

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

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