|Varying widely in size and character, these tough, sun-tolerant plants need lots of space. They have big, bold flowers and can spread rapidly. They include important seed oil and food crops such as the Common Sunflower and Jerusalem Artichoke, plus several ornamental perennials. Sunflowers are big-leafed, sturdy plants that need full sun and moist soils. Seeds attract birds. Perennial species grow rapidly, forming sizable clumps that can become invasive. Plant in large gardens or parks. Start by division or seed. All bloom in late summer and fall.
Best known for the 10-foot-tall type, with 8 to 14-inch-wide flowers full of seeds eaten roasted or raw. These annual plants also come 1½ to 4 feet high, with 2 to 3-inch-wide yellow blooms with brown or purplish centers or double, 5 to 7-inch-wide yellow flowers. Stake as needed. May be invasive.
Attributes - Helianthus annuus
Plant Type: Annual
Bloom Season: Early Summer through Late Summer
Flower Color: Yellow
Height: 6 ft. to 10 ft.
Width: 2 ft.
Sunlight: Full Sun
Helianthus 'Mammoth', Helianthus 'Music Box', Helianthus 'Prado Red', Helianthus annuus 'Sunburst', Helianthus giganteus, Helianthus maximiliana, Helianthus x multiflorus 'Flore-pleno', Helianthus x multiflorus 'Loddon Gold', Helianthus tuberosus