PRIMULA denticulata 'Blue Selection'

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PRIMULA denticulata 'Blue Selection'

Drumstick Primrose
Select Item No. PA783

Available

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



Plant Description

Life Cycle: Perennial
Family: Primulaceae
Origin: Afghanistan to Southeastern Tibet and Burma
Special Features: Lovely, dark blue shades on this select seed strain. Distinctively shaped 'drumstick' blossoms. One of the easiest primrose to germinate. Early spring flowering. Full sun in cool summer climates to semi-shade elsewhere.
Historical: Introduced by JELITTO PERENNIAL SEEDS in 1994.
 
Basic Colour: (blue)
Flower Colour: dark blue
Natural Flowering Period: March - April
 
Winter Hardiness Zones: Z4 - Z8
Foliage: spatula-shaped, toothed
Growth Habit: erect / rosettes-forming / clumping
Height with Flowers: 30 cm
Spacing between Plants: 25 cm
Soil Requirements: moist / humus rich, fertile
Location:
Characteristics: groundcover
Usage: for the rock garden
Grams per 1000 seeds: 0.05882 Gram
Seeds per Gram
(does not correspond to the number of plants!):
17000
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
0.5 Gram
Sowing Rates/Trays: 6 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: 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")
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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