How to Plant, Grow, and Care for Douglas Asters
Douglas asters erupt into bloom from late summer through autumn. Their purple petals and yellow centers decorate landscapes throughout western North America. Why not add them to your garden? Learn how to best care for these wildflowers alongside native plant....

gardener Jerad Bryant.
Douglas asters pop up around the same time that goldenrods do. You’ll see purple-yellow aster-like blooms alongside large yellow flower spikes of goldenrods. Both of these native species attract pollinators like butterflies and bees, and they help local insect species that need resources.
When you plant perennials like Douglas aster, you invite animals to return where they once were. Flowers lure bugs, bugs lure birds, and birds lure larger predatory animals. You feed the local food web by simply planting native flowers. This radical act will make your garden look gorgeous and boost your confidence as a naturalist.
A naturalist is anyone who wants to learn about their local environment. All you have to do is put time and effort into studying it. You don’t need a fancy degree or accreditation! Simply plant native plants and create a wildlife oasis in your backyard. In the West, Douglas aster is one of the toughest, easiest to grow, and most beautiful species you can start with.
Start with a few Douglas aster plants and watch as wildlife descends on them in droves. After seeing the benefits of one native species, you’ll want to plant dozens more!
What Is It?
Douglas asters are native wildflowers of western North America. Although aster is a part of their name, they are not true asters of the Aster genus. They’re a part of the Symphyotrichum genus, which includes other North American asters like Michaelmas daisy and leafy aster.
These New World asters work better in our landscapes than non-native ones, as they appeal to the insects and animals that live on our continent. Consider subbing marginally hardy and non-native asters for gorgeous, frost-tolerant, and tough native species.
Native Area
Douglas asters are close relatives of New York asters and Michaelmas daisies. The western species grows from Alaska southward through California, and east to Montana and Idaho. It prefers sandy sites near bodies of water, forests, and open meadows. Find the plants growing where Canada goldenrods are, as the two prefer similar conditions.
I often see this perennial poking out of the sand near the Willamette River by my home. It sprouts where the trees let sunlight poke through. The ample moisture near the riverside allows the roots to creep into new locations underground while the stems sow seeds aboveground, giving the plants two chances at spreading.
Characteristics
Douglas aster plants are leafy perennials with many qualities similar to European asters and daisies. They sprout hairy stems early with lance-shaped leaves. The leaves often have small teeth on the edges, and their tops and bottoms are hairless and green.
This North American aster reaches between 8 and 48 inches tall, although it sometimes grows taller and leggy if it doesn’t receive enough sunlight. In late summer through late autumn you’ll see dozens of flowers open up on the stem tips. They have purple-blue petals and sunshine-yellow composite centers.
Each composite center contains dozens of tiny flowers that form heads with multiple seeds after successful pollination. Leave the stems and seed heads and they’ll feed hungry birds throughout the winter. In cold zones with winter chill, this perennial dies back to the soil level. New sprouts emerge in spring as days lengthen and temperatures warm.
Planting
Because this is a tough perennial wildflower, getting it into the ground is simple. Your specimen will take off with new root growth shortly after planting and likely bloom this year. Seedlings may take longer to blossom and most likely will flower in their second year after growing successfully. Start seeds if potted plants are unavailable; otherwise, it’s easier to plant mature specimens from containers.
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