Id-Code: AA 124
Family: Ranunculaceae
Origin: Europe, Altai Mtns., Siberia
Special Features: Large yellow flowers
Colour: Yellow
Natural Flowering Period: April - May
Winter Hardiness Zones: Z2-8
Growth Habit: Compact mound
Foliage: Soft, ferny green leaves
Height with Flower: 30 cm (12'')
Spacing between Plants: 30 cm (12'')
Soil Requirement: Well-drained soils, pH 5.8 - 7.0
Location: Full Sun
Use: Plant Adonis in the rock garden with a companion, as it goes summer dormant. Combines beautifully Saponaria lutea, Sedum oreganum, and Cynoglossum nervosum
Specialities: A good seasonal container plant, too

Cultural Tips:
Grams per 1000 seeds: 12,5
Seeds per Gram: 80
Seeding Recommendation: 50 g / 1000 plants
Sowing Rate: 4 seeds per cell
Plug tray recommended size(s): open flats
Germination: The sowing must be kept warm (about +18 to 22°C) [about 64 to 72°F] and moist for the first 2-4 weeks. After this period the sowing must be kept at a cold temperature (between -4 and +4°C) [between 25 and 39°F] for another 4-6 weeks. It is not so important if the temperature is higher or lower during the cooling period, but the cooling period has to be prolonged because the synthesis of the germination inducer, hormonlike acid, slows down or comes to a standstill. It is beneficial to cover the sowing with snow during the cooling-period. The temperature below it usually keeps in the optimum range of -4 to 0°C [25 to 32°F]. The sowing is kept moist, and the melting snow helps to destroy the shell, which is advantageous for the germinating seedling. After this cooling-period the sowing may not be immediately exposed to high temperatures. The most effective temperatures are between +5 to 12°C [41 to 54°F], even if germination has started. The best location for this sowing, even in March, April and May, is the open field, the cold frame or a cold greenhouse.

These species usually show excellent results if sown soon after the harvest, although most of them only germinate in spring after the effect of winter. For best results please order seeds in time.

Scheduling:
Best Sowing Date: Sow soon after seeds ripen-mid summer. Order seeds well in advance
Sowing to Germination: 10 weeks or longer
Germination to Transplant: 4 - 6 weeks
Transplanting to salable Plant: 10 weeks or longer
Cutting-Back at Transplanting: Not necessary

Growing On:
Container Size(s): 1 plug per 8/9 cm (3 1/2''); 1-2 plugs per 11/12 cm (4 1/2'')
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)