DRACOCEPHALUM argunense 'Fuji Blue'

Dragonhead

Jelitto Perennial Seeds: DRACOCEPHALUM argunense 'Fuji Blue' - Dragonhead

Id-Code: DA 480
Family: Lamiaceae, Labiatae
Origin: Northeastern Asia
Special Features: Long-lived perennial that forms dark green mounds with distinctive foliage and colorful terminal flowering spikes
History: Introduced by JELITTO PERENNIAL SEED in 2001. Named for the famous Japanese Mount Fujiyama
Colour: Brilliant blue with a light blue lip
Natural Flowering Period: June - Mid-August
Winter Hardiness Zones: Z4-8
Growth Habit: Bushy
Foliage: Needle-like glossy leaves
Height with Flower: 30 cm (12'')
Spacing between Plants: 30 cm (12'')
Soil Requirement: Well-drained soils, pH 5.8 - 6.8
Location: Full sun or partial shade
Use: Suitable for containers, rock gardens or perennial borders. Plant together with Acaena inermis 'Purpurea', Scabiosa columbaria nana and Sedum spurium 'Summer Glory'
Specialities: Remarkably drought tolerant.
Also available as JELITTO GOLD NUGGET SEED® (DG 480)

Cultural Tips:
Grams per 1000 seeds: 3,571
Seeds per Gram: 280
Seeding Recommendation: 10 g / 1000 plants
Sowing Rate: 2-3 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 Date: Anytime
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

Growing On:
Container Size(s): 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: Light (100-150 ppm)

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