Hardiness zone | 4 |
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Blooming | July to September |
Height (cm) | 30-100 |
Spreading (cm) | 30 |
Sol | Cool or moist |
Formulation | Untreated |
Swamp Sunflower
Swamp Sunflower
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The Helenium autumnale is a hardy perennial that tolerates heavy, clayey soils. Its petals, of a brilliant yellow, end in three points which give the plant a unique appearance.
Sowing method : Mix seeds with an equal amount of damp sand or vermiculite. Place the mixture in a sealed plastic bag. Store the bag in a refrigerator or cool storage room for 30 days to 90 days. Sow seeds when there is no risk of ground frost. Sow seeds on the surface without covering after sowing. These seeds are very small and need light to germinate. Seeds can be mixed with fine sand or talcum for a uniform sowing.
Cultivation mode
Sowing method : Mix seeds with an equal amount of damp sand or vermiculite. Place the mixture in a sealed plastic bag. Store the bag in a refrigerator or cool storage room for 30 days to 90 days. Sow seeds when there is no risk of ground frost. Sow seeds on the surface without covering after sowing. These seeds are very small and need light to germinate. Seeds can be mixed with fine sand or talcum for a uniform sowing.
Latin name |
Helenium autumnale |
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Sowing guide |