Growing Hollyhocks in Zone 4
When to plant and harvest hollyhocks in Zone 4— based on your zone's frost dates.
Zone 4 sits comfortably within hollyhocks' best range (Zones 3–9), so it grows well here on a standard schedule.
Hollyhocks planting calendar for Zone 4
These months are derived from Zone 4's frost dates — last frost around Early – mid May, first frost around Mid September – mid October.
Start indoors
March
Sow outdoors
May
Transplant
—
Harvest
—
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A month-by-month Zone 4 chart with hollyhocks already on it — add the rest of your garden, then print it or save it as a PDF.
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Hollyhocks care at a glance
- Sunlight
- Full sun (6+ hours)
- Water
- 1 inch per week; drought-tolerant once established but rust worsens in dry stress
- Spacing
- 18–24 in apart
- Days to maturity
- First-season bloom with 8–10 week indoor start; second-year bloom from direct sow
- Best zones
- 3–9 (biennial; short-lived perennial via self-seeding)
Growing hollyhocks in Zone 4: FAQs
Can you grow hollyhocks in Zone 4?＋
Zone 4 sits comfortably within hollyhocks' best range (Zones 3–9), so it grows well here on a standard schedule.
When should I plant hollyhocks in Zone 4?＋
In Zone 4, start seeds indoors around March. Zone 4's last spring frost is typically Early – mid May and its first fall frost around Mid September – mid October, which sets the planting window.
When to harvest hollyhocks in Zone 4?＋
Harvest timing depends on your planting date and variety — hollyhocks typically matures in First-season bloom with 8–10 week indoor start; second-year bloom from direct sow. See the full guide for harvest cues.
Full Hollyhocks guide →
Complete care, problems, companions, and harvest tips.
Zone 4 overview →
Frost dates, climate, and everything to grow here.
October in Zone 4 →
What to sow, transplant, and harvest this month.