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|Special Features:||Round blossoms, decorative round prickly fruits until winter.|
|Historical:||Syn. SPARGANIUM polyedrum.|
|Natural Flowering Period:||June - July|
|Winter Hardiness Zones:||Z5 - Z8|
|Growth Habit:||rhizomatous / stoloniferous|
|Height with Flowers:||50 cm|
|Soil Requirements:||boggy / along streamsides / humus rich, fertile|
|Usage:||suitable for cutting / water or marshplant|
|Grams per 1000 seeds:||22.22222 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):
(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].