Growing Hollyhocks in Zone 10A

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

Zone 10A has a very long growing season with mild winters. Many crops can be grown nearly year-round with successive plantings.

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 10A

USDA Hardiness Zone 10A has an average last spring frost around Feb 1 and first fall frost around Dec 20. 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.