Collecting and Growing Rose of Sharon Seeds

Rose of Sharon (Hibiscus syriacus) produces abundant seed pods. Here’s how to harvest and grow them successfully.

When to Harvest

Leave pods on the shrub until they turn brown and begin to split open at the tips. This indicates ripe seeds inside. Collect promptly to avoid loss.

Seed Preparation and Stratification

• Seeds are dark, kidney-shaped, and ready to plant.
• No cleaning needed—just sow fresh or store cool/dry until spring.

Sowing and Germination

1. Start indoors 6 weeks before last frost.
2. Sow 1/4 inch deep in moist potting mix.
3. Keep at 75°F (24°C); germination in 1–2 weeks.
4. Grow under 40-watt shop lights (12–16 hrs/day).

Transplanting

After last frost, harden off in shade for 10 days. Plant in full sun (8+ hours) in well-drained soil. Seedlings bloom in 2–3 years. Note: Seedlings from hybrids may vary in flower color/form.