A Great Perennial Flower for Iowa Gardens & Late-Season Favorite for Attracting Pollinators
Asters are colorful perennial flowers that bring a late-season burst of color to Iowa gardens. Their star-shaped blooms appear in shades of purple, blue, pink, and white. This perennial flower adds fresh color to flower beds and borders as many summer flowers begin to fade.
These hardy perennials also attract bees, butterflies, and other pollinators, making asters a beautiful addition to pollinator-friendly gardens throughout Central Iowa.
Why Iowa Gardeners Choose Aster
Perennial asters are a great choice for Iowa gardeners looking for late-season color and pollinator-friendly flowers. Their daisy-like blooms brighten flower beds and borders while extending garden interest into late summer and fall.
- Late-season blooms from late summer into fall; extends the show through frost
- Thrives in full sun to part sun with good air circulation
- Pollinator powerhouse—fuel for migrating butterflies
- Often deer resistant; great cut flowers
- Upright habit that tucks easily into borders and meadow-style plantings
Planting & Spacing Instructions for Aster
- Best time to plant: Plant perennial asters in spring or early fall in workable, well-drained soil
- Soil: Average to moderately fertile; amend heavy clay with compost
- Spacing/size: Most varieties grow 12–48″ tall and 18–24″ wide; space for airflow to limit mildew
- Hardiness: Typically USDA Zones 3–8 (varies by variety)
Aster Care Made Simple
- Water: Keep evenly moist the first season; water during dry spells
- Pinch & stake: Pinch back tips in early summer for bushier, shorter plants and stronger stems; stake taller types if needed
- Deadhead: Remove spent blooms to tidy; divide every 2–3 years to maintain vigor
- Health: Morning sun and airflow help prevent powdery mildew
Other Plants that Partner Well with Aster
Pair Asters with sedum, echinacea, rudbeckia, goldenrod, and ornamental grasses for layered fall color and texture.
Are Asters Perennials or annuals?
Many of the asters grown in Iowa gardens are hardy perennials that return year after year when planted in suitable growing conditions. These perennial asters typically bloom from late summer into fall, providing garden color later in the growing season.
Asters are especially valuable in perennial gardens because their late-season flowers provide nectar for bees, butterflies, and other pollinators when fewer plants are in bloom.
Shop for Aster and Other Perennials at Holub Greenhouses of Ames
Visit Holub Greenhouses to explore our seasonal selection of asters and other perennial flowers for Iowa gardens. Our team will match color, height, and bloom time to your space—so your garden finishes the season strong.