ACHILLEA ageratifolia

Product 14 From 2772
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Plant Description

Life Cycle: Perennial
Family: Asteraceae
Origin: Central Balkans
Distinction: Award of Garden Merit (A.G.M.) from the Royal Horticultural Society.
Special Features: Drought tolerant species with white flowering corymbs and thick cushions of silver-grey leves that remain evergreen in milder climates. Durable species for containers or the rock garden. Excellent xeric choice.
 
Basic Colour: (white / cream)
Flower Colour: white
Natural Flowering Period: May - June
 
Winter Hardiness Zones: Z3 - Z8
Foliage: cushions of silver-grey leaves
Growth Habit: cushion / compact / evergreen / wintergreen
Height with Flowers: 15 cm
Spacing between Plants: 30 cm
Soil Requirements: dry / lime-loving, calcareous / well-drained / average
Location:
Usage: honey-bee food plant / for the rock garden
Grams per 1000 seeds: 0.12048 Gram
Seeds per Gram
(does not correspond to the number of plants!):
8300
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
0.5 Gram
Sowing Rates/Trays: 4 per cell
Plug tray recommended size(s): 72 / 128
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):
late autumn - early spring
Sowing to Germination: 4 - 6 weeks
Germination to Transplant: 4 - 6 weeks
Transplanting to Potting: 6 - 8 weeks
Cutting back at Transplanting: Not Necessary.
Container Size(s): 1 plug per 8/9 cm (3 1/2") / 1-2 plugs per 11/12 cm (4 1/2")
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: 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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