North America Native Plant

Ragweed

Botanical name: Ambrosia

USDA symbol: AMBRO

Life cycle: annual

Habit: subshrub

Native status: Native to Alaska âš˜ 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 Puerto Rico âš˜ It's either native or not native in the U.S. Virgin Islands  

Ragweed: The Misunderstood Native That Wildlife Actually Love Let’s talk about one of the most polarizing plants in North America: ragweed (Ambrosia). Before you wrinkle your nose and click away, hear us out! While this humble forb might not win any beauty contests, it plays a surprisingly important role in ...

Ragweed: The Misunderstood Native That Wildlife Actually Love

Let’s talk about one of the most polarizing plants in North America: ragweed (Ambrosia). Before you wrinkle your nose and click away, hear us out! While this humble forb might not win any beauty contests, it plays a surprisingly important role in supporting wildlife across the continent.

What Exactly is Ragweed?

Ragweed belongs to the genus Ambrosia and includes both annual and perennial species. These plants are what botanists call forbs – essentially non-woody plants that lack significant thickening from secondary growth. Think of them as the herbaceous cousins of shrubs and trees, with their growing points (called perennating buds) staying close to or below ground level.

Despite their reputation, ragweed species are fascinating plants that have adapted to thrive across an incredibly diverse range of environments.

Where Does Ragweed Call Home?

Here’s where things get interesting – ragweed has one of the most extensive distributions of any plant genus in North America. These adaptable plants are native to Alaska and Canada, and while their exact native status in the lower 48 states varies by species, they’ve naturalized across virtually the entire continent. You’ll find various Ambrosia species from Alabama to Wyoming, from British Columbia to Puerto Rico, and everywhere in between.

The Great Ragweed Debate: To Plant or Not to Plant?

Here’s where we need to have an honest conversation. Ragweed isn’t going to be the star of your flower border, and if you or your neighbors suffer from fall allergies, these wind-pollinated plants might not be your best friends. However, before you write them off completely, consider their ecological value.

A Wildlife Buffet in Disguise

While ragweed might look unremarkable to us, it’s actually a important food source for wildlife:

  • Birds love it: Terrestrial birds get 10-25% of their diet from ragweed and occasionally use it for cover
  • Small mammals appreciate it: These creatures derive 5-10% of their diet from ragweed, though they don’t often use it for shelter
  • Large animals browse it occasionally: While only making up 2-5% of their diet, even large animals will munch on ragweed
  • Waterfowl find it useful: Water birds also get 2-5% of their diet from these plants

Growing Ragweed: The Low-Maintenance Approach

If you’ve decided to embrace ragweed in your landscape, you’re in for a treat – these are some of the most low-maintenance plants you’ll ever encounter. As forbs, they’re naturally adapted to a wide range of conditions and don’t require the fuss that many ornamental plants demand.

Since specific growing requirements vary among the many Ambrosia species, your best bet is to observe what’s already thriving in your area. Most ragweed species are remarkably adaptable and will establish themselves with minimal intervention once conditions are right.

Where Ragweed Fits in Your Landscape

Ragweed isn’t destined for formal gardens, but it can play valuable roles in:

  • Prairie restorations and wildflower meadows
  • Wildlife gardens focused on supporting birds and small mammals
  • Naturalized areas where you want low-maintenance, native vegetation
  • Erosion control on slopes or disturbed areas

A Word of Caution

Before adding ragweed to your landscape, check with your local extension office about species-specific regulations in your area. While generally not considered invasive, some locations may have restrictions. Also, be mindful of neighbors with allergies – fall hay fever season might not be the time to win friends with your ragweed meadow!

The Bottom Line

Ragweed represents the ultimate in native, low-maintenance landscaping – if you can get past its humble appearance and notorious reputation. While it may never grace the cover of a gardening magazine, it’s quietly doing important work supporting wildlife across North America. Whether you choose to actively plant it or simply stop fighting the volunteers that appear naturally, ragweed deserves recognition as more than just a weed.

Sometimes the most valuable plants are the ones that ask for the least and give wildlife the most. In the case of ragweed, that philosophy might just help you see this misunderstood native in a whole new light.

Wildlife Status

Want to attract wildlife or keep hungry critters away from your garden? Understanding the relationship between plants and wildlife is key. While plant tags may indicate deer and rabbit resistance, they don't tell the full story. Every gardener has experienced the disappointment of purchasing "deer-resistant" plants only to find them nibbled to the ground!

The extent to which plants are resistant to animal browsing is a matter of degree. Likewise, the extent to which a plant attracts wanted visitors also varies. Whether you want a garden full or free of wildlife, learning about interactions between a plant and wild animals can help you make smarter choices for the garden you desire.

As shown below Shrubby Indian Mallow isn't a large food source for animals or birds. You can confidently add this plant to your garden and rest assured knowing it's unlikely to be devoured by four-legged visitors.

Small animals

5-10% of diet

Infrequently used as cover

Large animals

2-5% of diet

Sparsely used as cover

Terrestrial birds

Average 10-25% of diet

Occasional source of cover

Water birds

2-5% of diet

Sparsely used as cover

Sources:

Yarrow, G.K., and D.T. Yarrow. 1999. Managing wildlife. Sweet Water Press. Birmingham.Gee, K.L., M.D. Porter, S. Demarais, F.C. Bryant, and G.V. Vreede. 1994. White-tailed deer: Their foods and management in the Cross Timbers. Ardmore.Martin, A.C., H.S. Zim, and A.L. Nelson. 1951. American wildlife and plants: A guide to wildlife food habits. Dover Publications. New York.

Ragweed

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

Ambrosia L. - ragweed

Species

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