Sunflowers, of Helianthus annuus, are annual plants that can grow as high as ten feet tall. The stems and foliage are thick and green like cornstalks, but the leaves are rough and unpleasant to the touch. The head of the flower can grow up to a foot in diameter with several rows of yellow petals encircling the ?face? of the sunflower. The petals themselves only take up approximately an inch and a half on either side of the total diameter. The inside of the face is covered in edible seeds that spiral in two distinct directions. Over 200 sunflowers seeds can grow on one sunflower head.

Sunflowers grow best in moist, well-drained soil. As indicated by their name, sunflowers love full sun areas in the yard. Sunflowers are tolerant to both low and high temperatures, making it an ideal candidate for gardens all over the world. Sunflowers can be raised from seeds planted from March to May and bloom all summer long.

Sunflowers are not generally used in floral arrangements because they are unwieldy and can easily crush other flowers. In a vase, sunflowers are generally too large to be practical. Smaller varieties of sunflowers can be used in a vase, however.

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