Id-Code: DA 355
Family: Scrophulariaceae
Origin: Southern Europe and Western Asia
Special Features: Larger flowers and better yellow color than the species
History: Introduced by JELITTO PERENNIAL SEEDS in 1990, Origin is the Island Krk near the coast of Jugoslavia.
Colour: Thimble-shaped, yellow with brown
Natural Flowering Period: June - August
Winter Hardiness Zones: Z3-9
Growth Habit: Upright
Foliage: Lanceolate; attractive winter rosettes in milder climates
Height with Flower: 150 cm (60'')
Spacing between Plants: 60 cm (24'')
Soil Requirement: Well-drained soils, pH 5.8 - 6.8
Location: Full sun or partial shade
Use: Plant together with Echinacea 'Magnus', Eryngium 'Blaukappe' and Platycodon 'Hakone White'
Specialities: A towering plant with subtle flower coloring for the perennial border or as a cutflower
Cultural Tips:
Grams per 1000 seeds: 0,667
Seeds per Gram: 1500
Seeding Recommendation: 1 g / 1000 plants
Sowing Rate: 1-2 seeds per cell
Plug tray recommended size(s): 128 or 288
Germination: Rapidly germinating (2 to 3 weeks), keep seed in constant moisture (not wet) with temperatures of about +20°C (68°F). The seeds must be covered thinly. Keep in cooler conditions after germination occurs.
Scheduling:
Growing On:
Best Sowing Dates: Anytime
Sowing to Germination: 2 - 3 weeks
Germination to Transplant: 4 - 6 weeks
Transplanting to Salable Plant: 6 - 8 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: 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)
