Id-Code: CA 673
Family: Brassicaceae, Cruciferae
Origin: Caucasus
Special Features: Distinctive foliage and tall, spreading sprays with hundreds of beautiful, tiny white flowers
Distinction: Award of Garden Merit (A.G.M.) from The Royal Horticultural Society
Colour: White
Natural Flowering Period: June - July
Winter Hardiness Zones: Z5-8
Growth Habit: Tall and stately
Foliage: Large, heart-shaped cabbage-like leaves
Height with Flowers: 200 cm (72'')
Spacing between Plants: 150 cm (60'')
Soil Requirements: Well-drained soils, pH 5.8 - 7.2
Location: Full sun
Use: Plant in the back of the border with other bold perennials - Amsonia hubrichtii, Eupatorium maculatum 'Atropurpureum' and Peucedanum verticillare
Specialities: A regal speciment plant

Cultural Tips:
Grams per 1000 Seeds: 50
Seeds per Gram: 20
Seeding Recommendation: 60 g / 1000 plants
Sowing Rate: 4 seeds per cell
Plug tray recommended size(s): 72, 128
Germination: These perennial seeds germinate very irregularly over a long period. Lower temperatures of less than +5°C [41°F] are very effective. Seed trays should not be discarded prematurely. Constant moisture must be maintained. Do not leave in direct sunlight.

Scheduling:
Best Sowing Dates: June - July
Sowing to Germination: 4 - 6 weeks
Germination to Transplant: 6 - 8 weeks
Transplanting to Salable Plant: 6 - 8 weeks
Cutting-Back at Transplanting: Not necessary

Growing On:
Container Size(s): 1-2 plugs per 11/12 cm (4 1/2''); 2-3 plugs per 15 cm (6'')
Vernalization: There is no current research on vernalization but a prudent recommendation for any perennial would be 6-12 weeks (a few might need 15 weeks!) at an average daily temperature of 40°F (5°C). Exposure to cold may not be necessary for flowering but might improve quality.
Forcing: An obvious place to experiment - following vernalization - would be raising daytime temperatures to 60° - 65°F (15° - 17°C). Provide 16 hours of continuous lighting. During the short days of winter, provide a night interruption lighting of 4 hours between 10:00 p.m. and 2:00 a.m.
Fertilization: Medium (150-200 ppm)