North America Non-native Plant

Joyweed

Botanical name: Alternanthera

USDA symbol: ALTER2

Life cycle: annual

Habit: vine

Native status: Non-native, reproduces and persists in the wild in Hawaii âš˜ It's either native or not native in the lower 48 states âš˜ Non-native, reproduces and persists in the wild in Pacific Basin excluding Hawaii 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  

Joyweed: A Colorful Ground Cover with a Complex Story If you’ve been searching for a vibrant, low-maintenance plant to add some pizzazz to your garden, you might have stumbled across joyweed (Alternanthera). This cheerful little plant has quite the personality – and quite the travel history too! What Exactly is ...

Joyweed: A Colorful Ground Cover with a Complex Story

If you’ve been searching for a vibrant, low-maintenance plant to add some pizzazz to your garden, you might have stumbled across joyweed (Alternanthera). This cheerful little plant has quite the personality – and quite the travel history too!

What Exactly is Joyweed?

Joyweed is what botanists call a forb or herb – essentially a non-woody plant that stays relatively close to the ground. Think of it as the friend who’s always reliable but never tries to steal the spotlight from the towering trees and shrubs. As both an annual and perennial (depending on your climate), joyweed can either stick around for the long haul or make a memorable one-season appearance.

Where You’ll Find Joyweed Growing

This well-traveled plant has made itself at home across a impressive swath of the United States. You can find joyweed thriving in Alabama, Arizona, Arkansas, California, Florida, Georgia, Hawaii, Illinois, Kentucky, Louisiana, Maryland, Mississippi, Missouri, New Jersey, New Mexico, New York, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, and Virginia. It’s also established itself in Palau, Puerto Rico, the U.S. Minor Outlying Islands, and the Virgin Islands.

The Native Status Question

Here’s where things get interesting – and a bit complicated. Joyweed’s native status varies depending on where you’re gardening:

  • In Hawaii and the Pacific Basin, it’s considered non-native but has naturalized successfully
  • For the continental United States, Puerto Rico, and U.S. Virgin Islands, its native status is undefined
  • This mixed status means it’s neither clearly invasive nor clearly native in most areas

Should You Plant Joyweed?

The decision to plant joyweed really depends on your gardening goals and local conditions. Since it’s not listed as invasive or noxious, there’s no urgent environmental concern, but it’s worth considering your options carefully.

If you’re drawn to joyweed’s characteristics, you might also want to explore native alternatives in your area that could provide similar benefits while supporting local ecosystems. Your local native plant society or extension office can be great resources for finding regional alternatives.

Growing Joyweed Successfully

Unfortunately, specific growing conditions, hardiness zones, and care requirements aren’t well-documented for this plant as a whole genus. If you do decide to grow joyweed, you’ll want to:

  • Research the specific species or variety you’re considering
  • Start with a small area to see how it performs in your garden
  • Monitor its growth habits to ensure it doesn’t spread beyond where you want it
  • Consult with local gardening experts who have experience with the plant in your climate

The Bottom Line

Joyweed represents one of those garden plants that sits in the gray area between native and non-native. While it’s established across many states and doesn’t appear to be problematic, the lack of clear native status and limited growing information means you’ll want to do your homework before planting.

Consider starting your plant selection process by exploring what native ground covers and colorful forbs are indigenous to your specific region. You might discover some fantastic local alternatives that will not only beautify your garden but also provide valuable habitat and food sources for local wildlife.

Remember, the best garden choices are informed choices – so take your time, do your research, and choose plants that align with both your aesthetic goals and environmental values.

Joyweed

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Amaranthaceae Martinov - Amaranth family

Genus

Alternanthera Forssk. - joyweed

Species

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