PRIMULA auricula

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PRIMULA auricula

Auricula Primrose
(alpina)
Select Item No. PA742

Also available as:

Available

1 Portion contains 20-250 seeds depending on value and size.
Please switch to gram for larger quantities.



Plant Description

Life Cycle: Perennial
Family: Primulaceae
Origin: European Alps, Carpathians, and Apennines
Distinction: Award of Garden Merit (A.G.M.) from the Royal Horticultural Society.
Special Features: Hard-to-find true species. Yellow tubular blossoms, sometimes fragrant. Occurs naturally in limestone rock crevices. Early spring flowering.
Historical: Along with PRIUMULA hirsuta (P. rubra), this has been used to produce some of the oldest hybrids known as PRIUMULA x pubescens.
 
Basic Colour: (yellow / gold)
Flower Colour: yellow
Natural Flowering Period: April - June
 
Winter Hardiness Zones: Z3 - Z8
Foliage: succulent, oblong, sometimes with a whitish cast
Growth Habit: rosettes-forming
Height with Flowers: 15 cm
Spacing between Plants: 20 cm
Soil Requirements: dry / lime-loving, calcareous / gritty / average / humus rich, fertile / loamy
Location:
Characteristics: groundcover
Usage: for the rock garden
Portion weight: 0.037 Gram
Grams per 1000 seeds: 0.22222 Gram
Seeds per Gram
(does not correspond to the number of plants!):
4500
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
1 Gram
Sowing Rates/Trays: 4 per cell
Plug tray recommended size(s): open flats / 128
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: 8 - 10 weeks
Germination to Transplant: 4 - 8 weeks
Transplanting to Potting: 6 - 10 weeks
Container Size(s): 1 plug per 8/9 cm (3 1/2")
Fertilizer: Light (100-150 ppm)
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