RUDBECKIA maxima

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RUDBECKIA maxima

Coneflower, Black-Eyed Susan
Select Item No. RA172

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: North America: Missouri, south to Louisiana and Texas
Special Features: Handsome foliage and towering flowering stems with drooping golden blossoms surrounding the tall (5 cm) black center. Also well-suited for the back of the border or meadow planting.
 
Basic Colour: (yellow / gold)
Flower Colour: yellow
Natural Flowering Period: August - September
 
Winter Hardiness Zones: Z5 - Z9
Foliage: blue-green, paddle-shaped, ovate
Growth Habit: upright, erect
Height with Flowers: 200 cm
Spacing between Plants: 75 cm
Soil Requirements: dry / well-drained
Location:
Characteristics: solitary plant
Usage: suitable for cutting
Grams per 1000 seeds: 6.66667 Gram
Seeds per Gram
(does not correspond to the number of plants!):
150
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
15 Gram
Sowing Rates/Trays: 3 per cell
Plug tray recommended size(s): open flats / 72
Sowing Direction:

(15) Rapidly germinating, keep seed in constant moisture (not wet) with temperatures of about +20°C [68°F]. Seeds must be covered thinly. Do not cover very small seeds, but tightly press into the earth. Keep in cooler conditions after germination occurs.

Best Sowing Date
(northern Hemisphere, Field condition):
Anytime
Sowing to Germination: 2 - 3 weeks
Germination to Transplant: 4 - 8 weeks
Transplanting to Potting: 6 - 10 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: This species is not a suitable candidate for forcing.
Fertilizer: Medium (150-200 ppm)
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