North America Non-native Plant

Floating Spurge

Botanical name: Phyllanthus fluitans

USDA symbol: PHFL10

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Floating Spurge: An Aquatic Plant for Water Gardens If you’re looking to add some aquatic interest to your water garden, you might have come across floating spurge (Phyllanthus fluitans). This small aquatic plant, also known as redroot floater, has found its way into Florida’s waterways and might catch the eye ...

Floating Spurge: An Aquatic Plant for Water Gardens

If you’re looking to add some aquatic interest to your water garden, you might have come across floating spurge (Phyllanthus fluitans). This small aquatic plant, also known as redroot floater, has found its way into Florida’s waterways and might catch the eye of water gardening enthusiasts.

What is Floating Spurge?

Floating spurge is a perennial forb that lives its life on or near the water’s surface. As a forb, it’s essentially a soft-stemmed plant without any significant woody growth – think of it as the aquatic equivalent of your garden herbs, but one that’s perfectly adapted to life in the water.

Where Does It Grow?

Currently, floating spurge has established itself in Florida within the United States. However, it’s important to note that this plant isn’t native to North America – it’s what botanists call a non-native species that has been introduced and now reproduces on its own in the wild.

Wetland Wonder

This little plant is what experts classify as an obligate wetland species, meaning it almost always occurs in wetland environments. You won’t find floating spurge trying to make a home in your dry flower beds – it’s all about that aquatic life!

Should You Grow Floating Spurge?

Here’s where things get a bit tricky. While floating spurge isn’t currently listed as invasive, its status in many areas remains unknown. As a responsible gardener, you’ll want to consider a few factors:

  • It’s non-native, which means it didn’t evolve alongside local wildlife
  • Its impact on local ecosystems isn’t fully understood
  • Native alternatives might provide better benefits for local wildlife

Native Alternatives to Consider

If you’re excited about adding floating plants to your water feature, consider these native options that will support local ecosystems:

  • American lotus (Nelumbo lutea)
  • Spatterdock (Nuphar advena)
  • Water lily species native to your region
  • Water hyacinth alternatives native to your area

Growing Conditions

If you do choose to grow floating spurge, remember that it requires aquatic conditions. Unfortunately, specific growing requirements for this species are not well-documented, which makes successful cultivation a bit of a guessing game. What we do know is that it needs wetland conditions to thrive.

The Bottom Line

While floating spurge might seem like an interesting addition to your water garden, the lack of detailed information about its care requirements and potential ecological impacts makes it a less-than-ideal choice. Your best bet? Stick with native aquatic plants that are well-studied, easier to grow, and beneficial to local wildlife. Your local extension office can help you identify the best native floating plants for your specific region and water garden goals.

Remember, the most successful gardens work with nature, not against it – and choosing native plants is one of the best ways to create a thriving, sustainable water garden that both you and local wildlife will love.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Atlantic and Gulf Coastal Plain

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Floating Spurge

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

Euphorbiales

Family

Euphorbiaceae Juss. - Spurge family

Genus

Phyllanthus L. - leafflower

Species

Phyllanthus fluitans Benth. ex Müll. Arg. - floating spurge

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