CALAMINTHA grandiflora

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CALAMINTHA grandiflora

Large lowered Calamint
[Elfin Purple]
Select Item No. CA020

Also available as:

Available

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



Plant Description

Life Cycle: Perennial
Family: Lamiaceae
Origin: Southern Europe to Iran and Caucasus: mountain forests, mixed forests.
Special Features: Aromatic leaves and rose-purple flowers. Well-suited for containers, the rock garden or the front of the border. Suitable for natural landscaping. Attractive for butterflies and other pollinators. Moderate self-sowing at suitable locations. Drought tolerant/ for xeriscaping/ waterwise design. Erosion control. Spicy scent. Abundant and long lasting flowering.
 
Basic Colour: (red / scarlet / purple)
Flower Colour: purple-rose
Natural Flowering Period: May - July
Flowering: First year flowering
 
Winter Hardiness Zones: Z4 - Z7
Foliage: oval to oblong-oval, pointed, serrate or dentate, aromatic, green
Growth Habit: clumping / bushy
Height with Flowers: 20 cm
Spacing between Plants: 30 cm
Soil Requirements: dry / well-drained / average
Location:
Usage: honey-bee food plant / for the rock garden
Grams per 1000 seeds: 0.52632 Gram
Seeds per Gram
(does not correspond to the number of plants!):
1900
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
2 Gram
Sowing Rates/Trays: 2 - 3 per cell
Plug tray recommended size(s): 128 / 288
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: 4 - 12 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")
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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