HUMULUS lupulus

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HUMULUS lupulus

Common Hops

Select Item No. HA280

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Plant Description

Life Cycle: Perennial
Family: Cannabaceae
Origin: Europe, North America and Asia
Special Features: Attractive 'cone-like' seeds on female plants. Straw-colored flowering bracts. Plant on fence posts or trellises. Medicinal Plant of the Year 2007 in Germany.
Historical: Female plants are the source of hops, one of the principal ingredients of beer. Humulus is also related to cannabis.
 
Basic Colour: (green)
Flower Colour: straw-colored
Natural Flowering Period: July - September
 
Winter Hardiness Zones: Z4 - Z9
Foliage: opposite leaves with 3-5 lobes and bristly stems, green
Growth Habit: climbing
Height with Flowers: 200 cm
Spacing between Plants: 100 cm
Soil Requirements: sandy / average / loamy
Location:
Characteristics: medicinal plant / beneficial plant / culinary herb
Portion weight: 0.3 Gram
Grams per 1000 seeds: 2.85714 Gram
Seeds per Gram
(does not correspond to the number of plants!):
350
Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
10 Gram
Sowing Rates/Trays: 3 per cell
Plug tray recommended size(s): 72 / 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: 9 - 12 weeks
Germination to Transplant: 3 - 4 weeks
Transplanting to Potting: 6 - 8 weeks
Container Size(s): 1-2 plugs per 11/12 cm (4 1/2") / 2-3 plugs per 15 cm (6")
Fertilizer: Medium (150-200 ppm)
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