North America Native Plant

Polygala

Botanical name: Polygala

USDA symbol: POLYG

Life cycle: biennial

Habit: vine

Native status: Native to Canada âš˜ Non-native, reproduces and persists in the wild in Hawaii âš˜ It's either native or not native in the lower 48 states âš˜ It's either native or not native in Pacific Basin excluding Hawaii âš˜ Native to Puerto Rico âš˜ Native to the U.S. Virgin Islands  

Polygala: A Complex Genus for the Curious Gardener If you’ve stumbled across the name polygala in your gardening research, you might be wondering what exactly you’re dealing with. The truth is, Polygala represents an entire genus of plants rather than a single species – and it’s quite a large family ...

Polygala: A Complex Genus for the Curious Gardener

If you’ve stumbled across the name polygala in your gardening research, you might be wondering what exactly you’re dealing with. The truth is, Polygala represents an entire genus of plants rather than a single species – and it’s quite a large family at that, with hundreds of different members scattered across the globe.

What Exactly Is Polygala?

Polygala plants are forb herbs, which is a fancy way of saying they’re non-woody plants that lack the thick, woody stems you’d find on shrubs or trees. Think of them as the herbaceous cousins in the plant world – they might be annual (living for one year), biennial (taking two years to complete their life cycle), or perennial (coming back year after year), but they all share that soft, green stem characteristic.

These plants have perennating buds (the parts that survive to regrow) located at or below ground level, which helps them survive harsh conditions and return when the time is right.

Where Does Polygala Call Home?

Here’s where things get interesting – and a bit complicated. The native status of Polygala varies dramatically depending on where you are:

  • It’s native to Canada
  • It’s considered non-native but naturalized in Hawaii
  • Its status in the lower 48 states is undefined
  • It’s native to Puerto Rico and the U.S. Virgin Islands

You can find various Polygala species growing across an impressively wide range, from Alberta and British Columbia down to Florida and Hawaii, and just about everywhere in between. This extensive distribution includes most U.S. states, Canadian provinces, and several territories.

Should You Plant Polygala?

This is where we hit a bit of a roadblock. Because Polygala refers to an entire genus rather than a specific species, giving blanket recommendations becomes tricky. Each species within this genus has its own characteristics, growing requirements, and ecological impact.

What we can tell you is that the invasive, noxious, and rarity status of this genus as a whole is unknown – which means you’ll need to do some detective work if you’re interested in a specific Polygala species.

The Bottom Line for Gardeners

If you’re interested in adding a Polygala species to your garden, here’s our friendly advice: get specific! Rather than searching for Polygala in general, identify which exact species caught your eye. Once you know the specific species name, you can research:

  • Its native status in your area
  • Specific growing requirements
  • Potential benefits to local wildlife and pollinators
  • Any conservation concerns

Many Polygala species are known for their distinctive flowers and can make interesting additions to the right garden setting. However, without knowing the specific species you’re considering, we can’t give you the detailed growing guide you deserve.

Moving Forward

Consider this your starting point rather than your final destination. Take that scientific curiosity that brought you here and dig a little deeper. Whether you’re drawn to a native milkwort species or discovered an interesting Polygala variety at your local nursery, getting the full species name will unlock all the specific information you need to make an informed gardening decision.

Remember, the best gardens are built on knowledge – and in this case, a little more research will go a long way toward ensuring your gardening success!

Polygala

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Polygalales

Family

Polygalaceae Hoffmanns. & Link - Milkwort family

Genus

Polygala L. - polygala

Species

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