Growing Hollyhocks in Zone 5B

Hollyhocks are old-fashioned cottage garden classics with towering spires of blooms that bring vertical drama to any planting.

Zone 5B has a moderate growing season. Most crops do well here with proper timing around frost dates.

Top Growing Tips

• Biennial or short-lived perennial — start new seeds each year for continuity
• Plant against a fence or wall for support and classic cottage look
• Rust disease is common — remove affected leaves promptly
• Self-seeds reliably; let some plants go to seed for next year’s display
• Single-flowered varieties are better for pollinators than doubles

Companion Planting

Good companions: roses, lavender, echinacea, delphiniums

Avoid planting near: Areas with poor air circulation (worsens rust disease)

Harvest Timeline

Ornamental; harvest seed heads when paper-dry for saving

About Zone 5B

USDA Hardiness Zone 5B has an average last spring frost around Apr 18 and first fall frost around Oct 13. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.