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|Special Features:||Greenish yellow flower spadix and sword-like leaves. Plant in the wet areas of the garden. Plant parts can be poisonous.|
|Historical:||Scented leaves have been used for perfume and basketmaking. Other parts have alleged hallucinogenic and aphrodisiac properties but can be toxic.|
|Natural Flowering Period:||May - June|
|Winter Hardiness Zones:||Z3 - Z10|
|Growth Habit:||stoloniferous / erect / rhizomatous|
|Height with Flowers:||100 cm|
|Spacing between Plants:||60 cm|
|Soil Requirements:||boggy / humus rich, fertile|
|Characteristics:||toxic plant / medicinal plant / beneficial plant / groundcover|
|Usage:||water or marshplant|
|Grams per 1000 seeds:||4.16667 Gram|
|Seeds per Gram
(does not correspond to the number of plants!):
|Gram to get 1000 plants
(if sown directly into pots etc. you will need a larger quantity):
|Plug tray recommended size(s):||deep open flats|
(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.
(3) These species usually show excellent results if sown soon after the harvest, although most of them only germinate in spring after the effect of winter. For best results please order seeds in time.
(18) See 17. Allow the seed trays to be left for only 2–4 weeks at warm temperatures, then keep at 0°C [32°F] for another 4–6 weeks. It does not matter if the water freezes. After this treatment allow temperature to rise gradually.
(17) Waterplants must be sown in waterproof plastic trays or similar containers containing a nutritious muddy compost. Fill water up to 1 cm over the top of the compost. Keep the trays at warm temperatures of approximately +22°C [72°F].
|Sowing to Germination:||8 - 12 weeks|
|Germination to Transplant:||4 - 6 weeks|
|Transplanting to Potting:||6 - 8 weeks|
|Cutting back at Transplanting:||Not Necessary.|
|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:||This species is not a suitable candidate for forcing.|
|Fertilizer:||Medium (150-200 ppm)|