RUDBECKIA fulgida var. sullivantii 'Goldsturm'

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RUDBECKIA fulgida var. sullivantii 'Goldsturm'

Coneflower, Black-Eyed Susan
Select Item No. RA164

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 (Conneticut to North Carolina, west to Michigan and Missouri)
Distinction: Award of Garden Merit (A.G.M.) from the Royal Horticultural Society.
Selected as Perennial Plant of the year from the PPA (Perennial Plant Association).
Special Features: A durable, low maintenance, pest-free plant. Among the most popular of all perennials. Perennial Plant of the Year 1999 in North America.
Historical: The Bot. Garden of the University Graz received seed from USA and also handed them to Gebr. Schütz. During a privat visit Heinrich Hagemann (at this time the headgardener at Karl Foerster's nursery) noticed the plant and brought them to Karl Foerster's nursery in Potsdam, Germany in 1937. Seeing the flowers in 1938 for the first time, Foerster annointed this North American species 'Goldsturm' (Gold Sturm').
 
Basic Colour: (yellow / gold)
Flower Colour: golden with dark center
Natural Flowering Period: July - October
 
Winter Hardiness Zones: Z3 - Z8
Foliage: ovate, dark green
Growth Habit: upright, erect / rosettes / round
Height with Flowers: 70 cm
Spacing between Plants: 45 cm
Soil Requirements: average
Location:
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 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):
November - March
Germination to Transplant: 4 - 6 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: 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.
Fertilizer: Medium (150-200 ppm)
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