|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.
Sold as sunchokes or Jerusalem artichokes, its edible underground tubers have a potato-like texture and distinctive taste, used raw in salads or cooked. Tall stems produce 3 to 4-inch Sunflowers. Spreads readily and can become a pest, but if controlled makes a good screen or hedge.
Attributes - Helianthus tuberosus
Plant Type: Perennial
Bloom Season: Late Summer through Early Fall
Flower Color: Yellow
Height: 8 ft. to 12 ft.
Width: 3 ft.
Sunlight: Full Sun, Partial Sun
Climate: Zones 4, 5, 6, 7, 8, 9, 10
Notes: Thrives in Acid Soil, Wet Soil. Edible, Showy Flowers. Susceptible to Powdery Mildew, Rust.