Helianthus Angustifolius, Swamp Sunflower

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Helianthus Angustifolius A spreading perennial sunflower that likes it on the wet side. In a garden with amended soil, this can get upwards to 7' tall and spread if there is no com petition. In a field with lots of competition or drought stress, it will remain shorter, but will continue to thrive. Height 3'-7' Sun Exposure Full Sun Soil Moisture Moist, well-drained, Drought Tolerant Bloom Time Late Summer to Fall Habit Spreading Duration Perennial Seed Source Harris County Show more