Id-Code: AA 505
Family: Apiaceae, Umbelliferae
Origin: Korea
Special features: Decorative foliage and fascinating flowers
Distinction: Gold Medal 1993 Plantarium in Boskoop, Holland
Colour: Onion-sized flowering buds open to large hemispherical, dark, reddish-purple colored flowers
Natural Flowering Period: June - August
Winter Hardiness Zones: Z4-7
Growth Habit: Upright, stout flowering stems
Foliage: Dark green leaves consisting of three roughly identical leaf parts
Height with Flower: 140 cm (55'')
Spacing between Plants: 75 cm (30'')
Soil Requirement: Any good garden soil, pH 5.8 - 6.8
Location: Full sun or partial shade
Use: A striking architectural plant either alone or in small groups. Possible neighbours are Rudbeckia 'Goldsturm', Echinops 'Arctic Glow' and Stokesia 'Omega Skyrocket'
Specialities: Lush, tropical-looking; reseeds in the garden for long term use
Cultural Tips:
Grams per 1000 seeds: 1,923
Seeds per Gram: 520
Seeding Recommendation: 5 g / 1000 plants
Sowing Rate: 2-3 seeds per cell
Plug tray recommended size(s): 128s or open flats
Germination: These perennial seeds germinate very irregularly over a long period. Lower temperatues 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. See as well coldgerminator.
Scheduling:
Growing On:
Best Sowing Dates: November - March
Sowing to Germination: 4 - 8 weeks
Germination to Transplant: 4 - 8 weeks
Transplanting to Salable Plant: 6 - 10 weeks
Cutting-Back at Transplanting: Not necessary
Container Size(s): 1-2 plugs per 11/12 cm (4 1/2''); 2-3 plugs per 15 cm (6'')
Vernalization: A prudent recommendation would be to provide 6-12 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: This species is not a suitable candidate for forcing.
Fertilization: Medium (150-200 ppm)
