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2. Helianthus giganteus - Wikipedia

   en.wikipedia.org/wiki/Helianthus_giganteus

   Helianthus giganteus is a perennial herbaceous plant native to the northern United States and southern Canada that can grow up to 1–3 metres (3.3–9.8 ft) tall with instances to 4m (13 feet). The leaves are approximately 1 inch wide by 7 inches long, and partly rough. The flower heads are bright

3. Are Sunflowers Perennials That Will Return Year After Year in ...

   www.aol.com/sunflowers-perennials-return-garden...

   The common sunflowers we see in cut flower bouquets are annuals, as are the sunflowers grown for seeds, but other species are perennials. Many perennial sunflowers are native to the prairie ...

4. Helianthus - Wikipedia

   en.wikipedia.org/wiki/Helianthus

   The disk of a sunflower is made up of many little flowers. The ray flowers here are dried In North Carolina A sunflower seed growing. Sunflowers are usually tall annual or perennial plants that in some species can grow to a height of 300 centimetres (120 inches) or more. Each "flower" is actually a disc made up of tiny flowers, to form a larger ...

5. Perennial sunflower - Wikipedia

   en.wikipedia.org/wiki/Perennial_sunflower

   Perennial sunflower is a crop of sunflowers that are developed by crossing wild perennial and domestic annual sunflower species. Annual sunflower is a major oilseed crop. Genes from wild perennial relatives may increase root depth and mass and extend the growing season. These upgrades means future varieties with higher yields and better soil ...

6. The Best Flowers and Perennials to Plant in Your Garden ... - AOL

   www.aol.com/best-flowers-perennials-plant-garden...

   Sunflower. Though perennial sunflowers are not quite as large or fast growing as their annual cousins (Helianthus annuus), they are prolific bloomers for up to 12 weeks into the late autumn ...

7. How to Grow the Biggest and Brightest Sunflowers This Summer

   www.aol.com/grow-biggest-brightest-sunflowers...

   Alas, most sunflowers are annual flowers, meaning they do not come back each year like perennial flowers. But, there's a few pieces of good news. First, as you've read, they are easy to grow so ...