RUDBECKIA fulgida var. fulgida

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RUDBECKIA fulgida var. fulgida

Coneflower, Black-Eyed Susan
Select Item No. RA162

Also available as:

Available

One Portion is usually sufficient for approx. 50 plants.
Please switch to gram for larger quantities.



Plant Description

Life Cycle: Perennial
Family: Asteraceae
Origin: USA: upper south and lower midwest
Special Features: A long-flowering botanical variety with dark green foliage that blooms after 'Goldsturm' until frost. Graceful botanical variety and great season-extender. With more open habit than 'Goldsturm'.
 
Basic Colour: (yellow / gold)
Flower Colour: yellow-orange with dark center
Natural Flowering Period: September - November
 
Winter Hardiness Zones: Z3 - Z8
Foliage: dark green
Growth Habit: erect / clumping
Height with Flowers: 80 cm
Spacing between Plants: 70 cm
Soil Requirements: average
Location:
Characteristics: groundcover
Usage: honey-bee food plant / suitable for cutting
Grams per 1000 seeds: 0.86957 Gram
Seeds per Gram
(does not correspond to the number of plants!):
1150
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
3 Gram
Sowing Rates/Trays: 3 - 4 per cell
Plug tray recommended size(s): 72 / 128
Sowing Direction:

(9) These seeds germinate rapidly depending on species and origin. If germination does not occur after 3–4 weeks a cooling period of 2–4 weeks is recommended.

Best Sowing Date
(northern Hemisphere, Field condition):
late autumn - early spring
Sowing Time Hint: Nov.-March with warm/cold stratification, or in summer when greenhouse temp. are above 30 °C [85°F]
Germination to Transplant: 3 - 10 weeks
Transplanting to Potting: 4 - 6 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: 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: There has been no research, but 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. Some later flowering species can be forced in 14 - 16 weeks and perhaps sooner at warmer temperatures. Further experiments are warranted.
Fertilizer: Medium (150-200 ppm)
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