DIANTHUS barbatus 'Nigrescens'

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DIANTHUS barbatus 'Nigrescens'

Black Sweet William
[Sooty]
Select Item No. DA140

Available

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



Plant Description

Life Cycle: Perennial
Family: Caryophyllaceae
Origin: Europe
Distinction: Award of Garden Merit (A.G.M.) from the Royal Horticultural Society.
Special Features: Fragrant, deep maroon, 5 cm blooms and narrow green leaves maturing to a metallic mahogany color. Good, long-lasting cut flower.
Historical: Floriography, a language of flowers, was popular in the British Victorian era. Sweet William represented gallantry.
 
Basic Colour: (grey / black)
Flower Colour: deep maroon, nearly black
Natural Flowering Period: May - August
Flower: single
 
Winter Hardiness Zones: Z3 - Z8
Foliage: narrow, strap-shaped, green, mature to a shiny mahogany color
Growth Habit: clumping / wintergreen
Height with Flowers: 35 cm
Spacing between Plants: 35 cm
Soil Requirements: average / humus rich, fertile
Location:
Characteristics: ornamental foliage plant
Usage: suitable for cutting
Grams per 1000 seeds: 0.83333 Gram
Seeds per Gram
(does not correspond to the number of plants!):
1200
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
2 Gram
Sowing Rates/Trays: 2 - 4 per cell
Plug tray recommended size(s): 128 / 288
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: 1 - 2 weeks
Germination to Transplant: 4 - 6 weeks
Transplanting to Potting: 6 - 8 weeks
Cutting back at Transplanting: Cut-back once to keep more compact.
Container Size(s): 1 plug per 8/9 cm (3 1/2") / 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: 8-10 weeks to flower with no supplemental lighting at 65-70°F.(17-21°C).
Fertilizer: Medium (150-200 ppm)
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