The common sunflower (Helianthus annuus) is a species of large annual forb of the daisy family Asteraceae. The common sunflower is harvested for its edible oily seeds, which are often eaten as a snack food.

Helianthus annuus (Common Sunflower) is a tall, fast-growing annual with broad, oval to heart-shaped, roughly hairy leaves. It produces huge, brilliant flowers in summer, up to 12 in. across (30 cm), with yellow petals surrounding a dark chocolate central disk.

Nov 12, 2024 · The common sunflower (H. annuus) is an annual herb with a rough hairy stem 1–4.5 metres (3–15 feet) high and broad, coarsely toothed, rough leaves 7.5–30 cm (3–12 inches) long arranged in spirals.

There are 52 species of sunflowers, all native to North America and Mexico. This sunflower is 1 to 3 meters (ca. 39 to 118 inches) tall (cultivated forms often taller). The stem is stiff, and usually coarsely hairy (see photo D), often more than 2.5 centimeters (1 inches) in diameter.

Aug 26, 2024 · Sunflowers (Helianthus annuus) are treasures of summertime. These low-maintenance plants typically begin blooming in the midsummer and can persist into early fall. The flowers, which stretch around three to six inches across on average, have a broad central disk surrounded by short, yellow petals.

With bright blooms that go all summer, sunflowers are heat-tolerant, resistant to pests, and attractive to pollinators. Harvest the seeds in late summer and fall for a healthy snack, or feed them to the birds! Learn how to plant, grow, and care for sunflowers.

Mar 7, 2023 · Ready to plant sunflower seeds? Find out the best time to sow the seeds, how much sun they need, the best soil conditions, good and bad companion plants, plus care and harvest tips for growing these annual flowers.

Common Sunflower is and annual in the Asteraceae (daisy) family. It ommonly seen growing along roads, fences, fields, and in waste areas west of the Mississippi River and is the state flower of Kansas.

The common sunflower has a green erect stem covered in coarse hairs, growing on average around 2m tall. The leaves are broad, with serrated edges, and are alternately arranged on the stem. The ‘flower’ of the common sunflower is actually a pseudanthium, or flowerhead, made up of many small flowers.

May 1, 2020 · Common sunflower Helianthus annuus L. General description: Erect plant up to 14 ft tall with coarse stems. Lower leaves heart-shaped, upper ovate to lanceolate; margins toothed to entire. Numerous ‘sunflower’ heads produced up to 6” wide. Key ID traits: Rough stems and leaves, leaves heart-shaped, triangular or lanceolate with long petioles.