ALTHAEA cannabina

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ALTHAEA cannabina

Hemp Marsh Mallow, Palm Leaf Marshmallow
Select Item No. AA283

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



Plant Description

Life Cycle: Perennial
Family: Malvaceae
Origin: North Africa through Central Europe to the Caucasus and Southern Russia
Special Features: Blooms like hollyhocks and deeply lobed, hair leaves resembling Cannabis.
Historical: The stems have been used to make textiles and paper.
 
Basic Colour: (pink / salmon)
Flower Colour: lavender-rose with a darker eye
Natural Flowering Period: July - September
 
Winter Hardiness Zones: Z3 - Z10
Foliage: hairy top and bottom, deeply lobed
Growth Habit: erect
Height with Flowers: 180 cm
Spacing between Plants: 80 cm
Soil Requirements: average
Location:
Characteristics: beneficial plant / culinary herb
Usage: honey-bee food plant
Grams per 1000 seeds: 4.44444 Gram
Seeds per Gram
(does not correspond to the number of plants!):
225
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
15 Gram
Sowing Rates/Trays: 3 per cell
Plug tray recommended size(s): 72 / 128
Sowing Direction:

(8) These perennial seeds germinate very irregularly over a long period. Lower temperatures of less than +5°C [41°F] are very effective. Seed trays should not be discarded prematurely. Constant moisture must be maintained. Do not leave in direct sunlight. For Alstroemeria we recommend to keep sowing for 3 weeks at approximately +30°C [86°F], then 3 weeks at +5°C [41°F], then at +21°C [70°F].

Best Sowing Date
(northern Hemisphere, Field condition):
late autumn - early spring
Sowing to Germination: 3 - 6 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): 1-2 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)
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