Moist Sun Partial Shade

Helianthus

Helianthus spp.

Full Sun
High Water

Special Features

Native Pollinator-Friendly

Known for large, showy flowers. A favorite for back borders; attracts bees and birds with its seeds. Native giants excellent for back borders.

Plant Specifications

Bloom Time July to October
Hardiness Zone 3-9
Mature Height 4-8 feet
Mature Width 2-4 feet
Growth Rate Fast
Maintenance Level Low
Soil
Well drained Moist
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Growing Helianthus on Martha's Vineyard

Helianthus, the perennial sunflowers, bring bold, sunny-yellow late-season presence to the open, full-sun borders and naturalistic meadow programs of Martha's Vineyard, producing masses of golden daisy flowers from late July through October on vigorous, spreading plants that anchor the back of the border with structural authority. They thrive in the lean, sandy, well-drained soils widespread across the Vineyard and are notably tolerant of the coastal wind, summer drought, and occasional salt air influence characteristic of island growing conditions. The spreading rhizomatous habit of most perennial sunflower species is best accommodated in the larger-scale naturalistic plantings of estate properties in West Tisbury and Chilmark, where their colonizing growth becomes an asset rather than a management challenge.

Deer resistance is generally reliable. Estate Care professionals manage perennial Helianthus with firm division every two to three years to prevent them from overtaking companion plantings, and they value the genus in large-scale sunny border programs where bold late-season presence and ecological value for native bees and birds are both priorities.

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