North America Non-native Plant

Aster Thomsonii

Botanical name: Aster thomsonii

USDA symbol: ASTH3

Native status: Not native but doesn't reproduce and persist in the wild

The Mystery of Aster thomsonii: What We Know (And Don’t Know) About This Elusive Plant If you’ve stumbled across the name Aster thomsonii in your plant research, you’re not alone in wondering what exactly this plant is all about. Here’s the thing – this particular aster species is quite the ...

The Mystery of Aster thomsonii: What We Know (And Don’t Know) About This Elusive Plant

If you’ve stumbled across the name Aster thomsonii in your plant research, you’re not alone in wondering what exactly this plant is all about. Here’s the thing – this particular aster species is quite the puzzle in the gardening world, and there’s a good reason you might be having trouble finding detailed information about it.

The Challenge with Aster thomsonii

When it comes to Aster thomsonii, we’re dealing with what appears to be a plant name that has limited documentation in current botanical literature. This could mean several things: it might be an older name that’s no longer in use, it could be a regional or local designation, or it might be a name that’s been reclassified under a different botanical classification.

The world of plant taxonomy is constantly evolving, and many plants that were once classified as Aster species have been moved to other genera like Symphyotrichum or Eurybia. This botanical reshuffling can make tracking down specific species quite the adventure!

What This Means for Gardeners

If you’re specifically looking to grow Aster thomsonii, here’s what I’d recommend:

  • Double-check the source where you found this name – there might be additional information or clarification available
  • Consider whether this might be a regional common name for a more widely recognized aster species
  • Look into well-documented native aster alternatives that might meet your gardening needs

Native Aster Alternatives to Consider

While we sort out the mystery of Aster thomsonii, there are plenty of fantastic native asters that can bring beauty and ecological value to your garden:

  • New England Aster (Symphyotrichum novae-angliae) – a showstopper with purple-pink blooms
  • Aromatic Aster (Symphyotrichum oblongifolium) – drought-tolerant with masses of small purple flowers
  • White Oldfield Aster (Symphyotrichum pilosum) – creates beautiful clouds of tiny white flowers
  • Smooth Blue Aster (Symphyotrichum laeve) – elegant blue-purple blooms on sturdy stems

The Bottom Line

Sometimes in gardening, we encounter plant names that lead us down interesting rabbit holes. While Aster thomsonii remains something of an enigma, this search has hopefully introduced you to the wonderful world of native asters – plants that are guaranteed to support pollinators, provide late-season color, and add natural beauty to your landscape.

If you have specific information about Aster thomsonii or have encountered this plant name in a particular context, I’d love to hear about it! Plant identification and taxonomy can be wonderfully collaborative efforts, and every gardener’s experience adds to our collective knowledge.

In the meantime, consider exploring the many well-documented native asters available – they’re likely to give you all the beauty and ecological benefits you’re seeking, with the added bonus of reliable growing information to ensure your success.

Aster Thomsonii

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Aster L. - aster

Species

Aster thomsonii C.B. Clarke

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA