How to Propagate Symphyotrichum shortii

Multiplying the Midwest Marvel: Propagating Short’s Aster

Move over, mums! While those autumn icons may steal the show, there’s another late-blooming beauty deserving a place in your garden: Short’s Aster (Symphyotrichum shortii). This native perennial bursts forth with a profusion of daisy-like flowers in a stunning shade of blue-violet, adding a touch of wild grace to your landscape just as summer’s end draws near.

But the allure of Short’s Aster extends beyond its visual appeal. This resilient plant, native to the eastern and central United States, is delightfully low-maintenance and thrives in a variety of conditions. And the best part? Propagating Short’s Aster is surprisingly simple, allowing you to expand your garden’s beauty or share this Midwest marvel with friends. Let’s explore the most effective methods:

1. Division: The Gift that Keeps on Giving

Division is the easiest and most successful way to propagate Short’s Aster. This method involves digging up an established plant and separating it into smaller sections, each containing roots and shoots. Here’s how you can do it:

Timing is Key: Early spring or late fall, when the plant is dormant, is the ideal time for division.
Dig Deep: Carefully dig around the plant, ensuring you go deep enough to avoid damaging the root system.
Divide and Conquer: Gently pull apart the plant into smaller sections, ensuring each clump has a good amount of roots and at least one healthy shoot.
Replant and Rejoice: Replant the divisions at the same depth they were originally growing and water them thoroughly.

2. Starting from Seed: Patience is a Virtue

While a bit more time-consuming, starting Short’s Aster from seed can be deeply rewarding. Follow these steps for success:

Seed Collection: Collect seeds from mature flower heads in late fall. Look for fluffy, white seed heads – these are ripe and ready to harvest.
Cold Stratification: Short’s Aster seeds require a period of cold stratification to mimic natural winter conditions. Store seeds in a sealed container with slightly damp vermiculite in your refrigerator for 4-6 weeks.
Sowing Time: Sow the stratified seeds indoors, 6-8 weeks before the last expected frost, or directly outdoors after the danger of frost has passed.
Light and Water: Seeds need light for germination, so press them lightly into the soil surface. Keep the soil consistently moist but not soggy.

3. Cuttings: A Quick and Easy Option

For a faster propagation method, try taking cuttings. Here’s a simple guide:

Choosing the Right Cuttings: In late spring or early summer, select healthy, non-flowering stems.
Making the Cut: Cut a 4-6 inch section from the stem tip, just below a leaf node.
Hormone Boost (Optional): Dipping the cut end in rooting hormone can encourage faster and more successful rooting.
Planting the Cutting: Plant the cutting in a well-draining potting mix, ensuring at least one leaf node is buried.
Humidity is Key: Cover the pot with a plastic bag or humidity dome to retain moisture and promote rooting.

Caring for Your New Aster Family

Regardless of the propagation method you choose, provide your young Short’s Asters with adequate moisture, well-drained soil, and dappled sunlight to thrive. With a little care and attention, you’ll soon have a beautiful colony of these charming wildflowers gracing your garden for years to come.

So, why not invite Short’s Aster into your garden? With its captivating beauty, easy propagation, and low-maintenance nature, it’s a native plant that’s sure to win your heart.