Asters are daisy-like perennials with starry-shaped flower heads. They bring delightful color to the garden. You can find an aster for almost any garden and they have many uses, such as in borders, rock gardens, or wildflower gardens. Asters also attract butterflies to your garden! Growing Asters is easy. All Asters are yellow in the center of the flower. They are daisy-like in appearance, even though they are a member of the sunflower family. Aster seeds should germinate within 10 to 14 days.