Hollyhock in Zone 10a
Alcea rosea
Method: Start indoors — Start indoors from seed, then transplant outside — in your zone, Hollyhock needs a head start on the heat that direct-sowing elsewhere doesn't require.
| Start indoors | Aug–Jan |
|---|---|
| Direct sow / transplant outside | Oct–Mar |
| Estimated bloom | ~180 days after transplanting |
Spacing: about 5 square feet per plant (square-foot-gardening spacing).
Zone 10a dates sourced from growinginthegarden.com.
Good companions
- Nasturtium — Planted at hollyhock's base, reputed to help suppress the antifungal-sensitive rust spores that commonly affect hollyhock.
- Garlic — Planted at hollyhock's base, reputed to help suppress rust via antifungal root secretions.
Where to buy hollyhock seeds
Some links on this page go to retailers we may eventually earn a commission from as an affiliate, at no extra cost to you. We only recommend products with a genuine consensus of positive, independent reviews — see the sources cited on each item.
See it growing
Search YouTube for "growing hollyhock" videos → (a live search, not a hand-picked video — results vary and aren't vetted by us)
← Back to the full zone 10a calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →