Product Details
Lifecycle: Short-lived perennial / biennial
Mature Size: 24–30 in tall × 12–18 in wide
Sun: Full sun to partial shade
Soil: Average, well-drained, evenly moist
Bloom Season: Late spring to early summer
Flower Color: Double white
Approximate Seeds Per Packet: 50
USDA Hardiness Zones: 3–8 (short-lived perennial)
Reliably overwinters in Zones 3–8
Dies back after frost and re-emerges in spring
In warmer climates (Zone 8), afternoon shade improves longevity
Often self-sows gently, extending its presence in the garden
Prefers cool spring conditions and struggles in prolonged heat
Growing Guide
Sowing Depth
Surface sow and press lightly into soil. Light aids germination.
Germination Time
21–30 days
Cold Stratification
Cold stratification improves germination rates. Provide 3–4 weeks at 35–40°F before moving to warmth, or fall sow outdoors for natural winter conditioning.
Starting Indoors
Sow 8–10 weeks before last frost. After stratification, maintain temperatures at 65–70°F and keep soil consistently moist but not wet.
Starting Outdoors
Direct sow in late fall or early spring. Fall sowing often yields the most uniform germination.
Placement & Cultivation
Best planted toward the front or middle of borders where the detailed blooms can be appreciated. Remove spent flowers to prevent excessive self-sowing if desired. Allow some to set seed if naturalizing is welcome.
Final Spacing
12–18 inches
Water Requirements
Moderate. Keep evenly moist during establishment.
Soil pH
Neutral to slightly alkaline
Fertilizer
Incorporate compost at planting. Avoid excessive nitrogen.
Pests & Diseases
May experience leaf miner in humid climates. Remove affected foliage promptly.
Cut Flower Use
Harvest when flowers are fully open but still firm. Delicate stems; handle gently.

