Seed Treatment:
- Warm Stratify: Place seeds in a sealed plastic bag with moist vermiculite, sand, or a damp paper towel. Keep at 18–22 °C (64–71 °F) for 2–4 weeks.
- Cold Stratify: After warm stratification, move the sealed bag to the fridge at -4 to +4 °C (24–39 °F) for 4–6 weeks.
If cold temps aren't consistently reached, extend stratification time.
If seedlings emerge during stratification, remove immediately and plant in moist soil.
Damp Paper Towel Method
Yes, you can use the damp paper towel method for both warm and cold phases. Seal in a zip-lock bag and monitor regularly.
Best Sowing Time
- Indoors: Late winter to early spring (Jan–March)
- Outdoors: Fall (Sept–Nov) to allow natural stratification
Optimum Germination Temperature
Keep soil at 15–18 °C (59–64 °F) during germination after stratification.
Germination Time: 4 to 12 weeks (up to 84 days) after stratification
Sowing Instructions
- Sow on the surface of moist, well-draining soil. Do not cover deeply—light aids germination.
- Use seed trays, modules, or small pots. Mist gently to avoid disturbing seeds.
- Keep evenly moist but not soggy. Use a humidity dome or clear plastic cover.
Light Requirements
Partial to full shade. Avoid direct afternoon sun—ideal for woodland or shaded borders.
Post Germination Care
- Transplant when seedlings have at least two true leaves.
- Harden off before moving outdoors if started indoors.
- Keep soil consistently moist. Avoid letting it dry out.
- Mulch to retain moisture and suppress weeds.
Growth Habit
Forms a clump of attractive, lobed foliage. Produces creamy-yellow flowers on tall stalks in late summer. Great for shady gardens.
Growing Tips
- Prefers humus-rich, moist but well-drained soil
- Protect young plants from slugs and snails
- Once established, it’s a hardy and reliable perennial
Enjoy this rare and elegant shade plant in your garden!