Native Plants

Aster

Symphyotrichum ×gravesii

USDA symbol: SYGR6

perennial forb

Lower 48 states: native

If you’re a native plant enthusiast always on the hunt for something truly special, you might want to take note of Graves’ aster (Symphyotrichum ×gravesii). This little-known perennial represents one of those botanical mysteries that makes native gardening so fascinating—a hybrid aster species that calls Connecticut home. Symphyotrichum ×gravesii is ...

Graves’ Aster: A Rare Connecticut Native Worth Knowing

If you’re a native plant enthusiast always on the hunt for something truly special, you might want to take note of Graves’ aster (Symphyotrichum ×gravesii). This little-known perennial represents one of those botanical mysteries that makes native gardening so fascinating—a hybrid aster species that calls Connecticut home.

What Makes This Aster Special

Symphyotrichum ×gravesii is what botanists call a natural hybrid, indicated by that × symbol in its scientific name. Also known by its synonym Aster gravesii, this perennial forb belongs to the vast and beloved aster family. Like other members of this group, it’s an herbaceous plant without woody stems, storing its energy underground to return year after year.

Where You’ll Find It (Or Won’t)

Here’s where things get interesting—and a bit challenging for gardeners. This aster appears to be endemic to Connecticut, making it one of the state’s unique botanical treasures. Its extremely limited range suggests this is either a very new hybrid or one that occurs only under very specific conditions.

  • Species observed
  • No observations

The Challenge for Gardeners

If you’re thinking about adding Graves’ aster to your garden, you’re going to face some hurdles. This plant is so uncommon that there’s virtually no information available about:

  • Specific growing conditions it prefers
  • Mature size and growth habits
  • Flowering characteristics
  • Propagation methods
  • Commercial availability

Should You Try to Grow It?

While Graves’ aster sounds intriguing, the reality is that you’re unlikely to find it in nurseries or seed catalogs. Its rarity and limited documentation suggest it may be restricted to very specific habitats or conditions that are difficult to replicate in typical garden settings.

Better Alternatives for Your Garden

Instead of chasing this elusive hybrid, consider these reliable native asters that will thrive in Connecticut gardens:

  • New England Aster (Symphyotrichum novae-angliae) – A showstopper with purple-pink flowers
  • Smooth Blue Aster (Symphyotrichum laeve) – Drought-tolerant with lovely blue blooms
  • White Oldfield Aster (Symphyotrichum pilosum) – Great for naturalizing
  • Aromatic Aster (Symphyotrichum oblongifolium) – Compact and fragrant

Why Asters Matter

Whether you grow Graves’ aster or its more common cousins, asters play crucial roles in native ecosystems. They bloom late in the season when many other flowers have faded, providing essential nectar for migrating butterflies and late-season pollinators. Their seeds feed birds through fall and winter.

The Bottom Line

Symphyotrichum ×gravesii represents the fascinating complexity of plant evolution and hybridization. While it may not be practical for most gardeners to pursue, its existence reminds us that there are still botanical mysteries in our own backyards. Focus your energy on the many other beautiful, well-documented native asters that will bring reliable beauty and ecological benefits to your landscape.

Sometimes the best way to honor rare plants like Graves’ aster is to create habitat for their more common relatives—and who knows? You might just stumble upon something special in your own garden adventures.

Symphyotrichum ×gravesii is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Symphyotrichum ×gravesii is also known as:

Aster gravesii Burgess, database artifact | USDA symbol: ASGR18
Aster ×gravesii Burgess | USDA symbol: ASGR8

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Asterales
Family: Asteraceae Bercht. & J. Presl - Aster family
Genus: Symphyotrichum Nees - aster

Species: Symphyotrichum ×gravesii (Burgess) G.L. Nesom [dumosum × laeve] - aster

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