POLEMONIUM reptans

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POLEMONIUM reptans

Creeping Jacob's Ladder, Greek Valerian
Select Item No. PA496

Available

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



Plant Description

Life Cycle: Perennial
Family: Polemoniaceae
Origin: Eastern USA: moist meadows.
Special Features: Adaptable to many climates, and long lived. Plant en masse for naturalizing in the woodland garden. flowers set above the foliage.
Historical: Plants have been used medicinally in the treatment of colds, bronchitis and inflammatory diseases.
 
Basic Colour: (blue)
Flower Colour: light blue
Natural Flowering Period: April - May
 
Winter Hardiness Zones: Z3 - Z8
Foliage: 11 to 17 widely spread lanceolate leaflets, deep green
Growth Habit: clumping
Height with Flowers: 40 cm
Spacing between Plants: 50 cm
Soil Requirements: moist / well-drained
Location:
Characteristics: medicinal plant
Usage: for the rock garden / suitable for cutting / flowering pot plant
Grams per 1000 seeds: 1.66667 Gram
Seeds per Gram
(does not correspond to the number of plants!):
600
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
3 Gram
Sowing Rates/Trays: 2 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 - 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: 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)
Jelitto · Seeds of more than 3700 different species and varieties

 

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