ERYNGIUM giganteum

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ERYNGIUM giganteum

Miss Willmott's Ghost
[Miss Wilmott's Ghost]
Select Item No. EA164

Available

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



Plant Description

Life Cycle: Biennial
Family: Apiaceae
Origin: Caucasus
Distinction: Award of Garden Merit (A.G.M.) from the Royal Horticultural Society.
Special Features: Distinctive 'Ghost White' blossoms contrast splendidly with the spineless green (sometimes bluish) leaves. Good cut flower that easily self-sows.
Historical: Miss Willmot would gather seed of one of her favorite garden plants and cleverly scatter them around in other gardens. People were surprised when these plants began growing! Who knows how many gardens became haunted with Miss Willmott's Ghost?
 
Basic Colour: (white / cream)
Flower Colour: ivory white
Natural Flowering Period: July - August
 
Winter Hardiness Zones: Z4 - Z9
Foliage: rounded, spineless basal leaves
Growth Habit: upright, erect
Height with Flowers: 70 cm
Spacing between Plants: 45 cm
Soil Requirements: dry / well-drained
Location:
Usage: suitable for cutting
Grams per 1000 seeds: 6.25 Gram
Seeds per Gram
(does not correspond to the number of plants!):
160
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
30 Gram
Sowing Rates/Trays: 5 per cell
Plug tray recommended size(s): open flats / 72
Sowing Direction:

(1) Cold-germinators are still referred to as frost-germinators, although this isn’t quite correct. The sowing must be kept warm (about +18 to +22°C) [about 64 to 72°F] and moist for the first 2–4 weeks. After this period the sowing must be kept at a cold temperature (between –4 and +4°C) [between 25 and 39°F] for another 4–6 weeks. Colder temperatures of –5°C [23°F] are only advantageous for most species of the Ranunculus family. It is not so important if the temperature is higher or lower during the cooling period, but the cooling period has to be prolonged because the synthesis of the germination inducer, hormon-like acid, slows down or comes to a standstill.
It is beneficial to cover the sowing with snow during the cooling-period. The temperature below it usually keeps in the optimum range of –4 to 0°C [25 to 32°F]. The sowing is kept moist, and the melting snow helps to destroy the shell, which is advantageous for the germinating seedling. After this cooling-period the sowing may not be immediately exposed to high temperatures. The most effective temperatures are between +5 to +12°C [41 to 54°F], even if germination has started. The best location for this sowing, even in March, April and May, is the open field, the cold frame or a cold greenhouse.

Best Sowing Date
(northern Hemisphere, Field condition):
late autumn - early spring
Sowing to Germination: 4 - 8 weeks
Germination to Transplant: 6 - 8 weeks
Transplanting to Potting: 8 - 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: 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: 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: Light (100-150 ppm)
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