Globeflower "Lemon Supreme"

Family: Ranunculaceae.
Origin: Europe, Caucasus and North America.
Special Features: An abundance of lemon yellow, bowl-shaped blossoms on a much shorter and compact plant.
History: Introduced by JELITTO PERENNIAL SEEDS in 2010.
Colour: Lemon Yellow.
Natural Flowering Period: May - June.
Winter Hardiness Zones: Z4-7.
Growth Habit: Vigorous growth, dwarf and compact.
Foliage: Lobed leaves.
Height with Flowers: 30 cm. Spacing between Plants: 24 cm.
Soil Requirements: Cool, moist soils preferred, pH 5.8 - 6.8.
Location: Full sun to partial shade.
Use: Looks magnificent in the cool, humus-rich garden with Primula japonica "Alba", Potentilla nepalensis "Ron McBeath" and Deschampsia "Pixie Fountain".
Specialities: Cute little cut flowers. Reliable first year flowering.
Cultural Tips: Grams per 1000 Seeds: 0,833. Seeds per Gram: 1200.
Seeding Recommendation: 3 g / 1000 plants.
Sowing Rate: 3-4 seeds per cell.
Plug tray recommended size(s): 72, 128 or open flats.
Germination.
The sowing must be kept warm (about +18 to 22°C) 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) 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. 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, 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. Most species of the Ranunculus-family need lower temperatures during the cooling-period - about -5°C. The reason is probably the freezing point of these seeds, which is at -7°C, while most other seeds freeze at -5 °C.
Scheduling.
Best Sowing Dates: November - March.
Sowing to Germination: 8 - 10 weeks.  Germination to Transplant: 4 - 8 weeks.
Transplanting to Salable Plant: 6 - 10 weeks.
Cutting-Back at Transplanting: Cut-back once to keep more compact.
Growing On: Container Size(s): 1 plug per 8/9 cm; 1-2 plugs per 11/12 cm.
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 5°C. Exposure to cold may not be necessary for flowering but might improve quality.
Forcing: Early spring flowering. No forcing necessary.
Fertilization. Medium (150-200 ppm).

Eng.: Globeflower, Globe Flower.