Hardiness zone | 4 |
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Blooming | July to September |
Height (cm) | 30-100 |
Spreading (cm) | 30 |
Sol | Cool, 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.
Cultivation mode
Plantation : 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 to 90 days. Sow seeds when there is no risk of ground frost.
Soil : cool, moist
Culturals practices : Or plant the seeds outdoors during the fall. Germination will occur the following spring or later on.
Latin name |
Helenium autumnale |
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Sowing guide |