How to Prune Wood's Blue Aster for Stronger Stems and More Blooms

Wood's blue aster (Symphyotrichum dumosum 'Wood's Blue') is a compact, fall-blooming perennial that benefits from a simple two-step pruning routine. A gardener in zone 5 asked whether to cut it to the ground in spring.

Spring Cleanup

Cut all old stems back to the ground in early spring before new growth emerges. This removes dead material and makes way for fresh shoots.

Mid-Season Pinch (The "Chelsea Chop")

By June or July, the plant will be tall and budding. Cut the stems back by about half. This encourages branching, resulting in sturdier stems that won't flop under the weight of fall flowers, and promotes more numerous, longer-lasting blooms.

Companion Planting Tip

Plant yellow chrysanthemums in front of the asters. The mums provide a gorgeous color contrast in fall and their sturdy stems help support the aster foliage.

Quick Care Summary

• Zone: 4-8
• Light: Full sun to part shade
• Soil: Average, well-drained
• Height: 12-18 inches
• Bloom: Late summer to fall

With this simple regimen, your Wood's blue aster will stay compact, upright, and covered in lavender-blue daisies every autumn.