TROLLIUS europaeus

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TROLLIUS europaeus

Globe Flower
Select Item No. TA256

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Plant Description

Life Cycle: Perennial
Family: Ranunculaceae
Origin: Europe to Western Siberia: damp grassland, edges of ponds, riverbanks.
Special Features: Charming, globed shaped flowers. Good for the border or for meadow plantings in cooler climates. Plant of the Year 1995 in Germany.
 
Basic Colour: (yellow / gold)
Flower Colour: egg yolk yellow
Natural Flowering Period: May - June
 
Winter Hardiness Zones: Z4 - Z7
Foliage: deeply cut 3-5-parted, dentate, deep green
Growth Habit: erect
Height with Flowers: 60 cm
Spacing between Plants: 50 cm
Soil Requirements: moist / cool
Location:
Characteristics: toxic plant
Usage: suitable for cutting
Portion weight: 0.2 Gram
Grams per 1000 seeds: 0.8 Gram
Seeds per Gram
(does not correspond to the number of plants!):
1250
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
5 Gram
Sowing Rates/Trays: 7 per cell
Plug tray recommended size(s): 72 / 128
Sowing Direction:

(2) Most species of the Ranunculus-family need lower temperatures during the cooling-period – about –5°C [23°F]. In other respects follow the directions in 1. above. The reason is probably the freezing point of these seeds, which is at –7°C [19°F], while most other seeds freeze at –5°C [23°F].

(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): 1-2 plugs per 11/12 cm (4 1/2")
Fertilizer: Medium (150-200 ppm)
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