CALTHA palustris

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GOLD NUGGET SEED ® CALTHA palustris   Seeds (Image Rights)

CALTHA palustris

Kingcup, Marsh Marigold, May-Blob, Meadow Bright, Souci d'eau
Select Item No. CG044

Also available as:

1000 Seeds

Available

The minimum order quantity for this article are 200 seeds.

There are no units prepacked, any seed amount ( > minimum quantity) is weighed individually.



Plant Description

Article Type: (GOLD NUGGET SEED®)
Life Cycle: Perennial
Family: Ranunculaceae
Origin: Northern Hemisphere
Distinction: Award of Garden Merit (A.G.M.) from the Royal Horticultural Society.
Special Features: The beloved flowers - the color of butter - and the glossy green heart-shaped leaves, once used in salads by early settlers in the USA. A plant perfectly suited for stream banks or at the edge of pools. Plant of the Year 1999 in Germany.
Historical: Pliny and Virgil commonly used the name Caltha for yellow flowers, possibly for Caltha palustris. Palustris indicates that it is from moist areas.
 
Basic Colour: (yellow / gold)
Flower Colour: deep yellow
Natural Flowering Period: April - May
 
Winter Hardiness Zones: Z3 - Z7
Foliage: heart-shaped, shiny green, toothed margins
Growth Habit: clumping / dense
Height with Flowers: 30 cm
Spacing between Plants: 30 cm
Soil Requirements: boggy
Location:
Characteristics: toxic plant / medicinal plant
Usage: water or marshplant
Grams per 1000 seeds: 0.67568 Gram
Seeds per Gram
(does not correspond to the number of plants!):
1480
Plug tray recommended size(s): open flats
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: 3 - 4 weeks
Germination to Transplant: 4 - 8 weeks
Transplanting to Potting: 6 - 10 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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