North America Native Plant

Floatingheart

Botanical name: Nymphoides humboldtiana

USDA symbol: NYHU

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states âš˜ Native to Puerto Rico  

Floatingheart: A Mysterious Aquatic Plant with Limited Garden Appeal If you’ve stumbled across the name floatingheart (Nymphoides humboldtiana) while researching aquatic plants for your water garden, you might be wondering what exactly this plant is and whether it deserves a spot in your landscape. Well, grab a cup of coffee ...

Floatingheart: A Mysterious Aquatic Plant with Limited Garden Appeal

If you’ve stumbled across the name floatingheart (Nymphoides humboldtiana) while researching aquatic plants for your water garden, you might be wondering what exactly this plant is and whether it deserves a spot in your landscape. Well, grab a cup of coffee and settle in, because this particular floatingheart is quite the enigma in the gardening world.

What Exactly Is Floatingheart?

Nymphoides humboldtiana is a perennial aquatic forb – basically, a non-woody water plant that comes back year after year. Unlike trees or shrubs, this plant lacks significant woody tissue and keeps its growing points at or below the ground surface, making it well-adapted to aquatic life.

As an obligate wetland plant, this floatingheart almost always occurs in wetlands, meaning it’s completely dependent on consistently wet conditions. Think of it as the plant equivalent of a fish – it simply can’t survive without its watery home.

Where Does It Come From?

Here’s where things get interesting (and a bit complicated). This floatingheart is native to Puerto Rico, but it’s also been documented in Texas as an introduced species. It has established itself in the wild and reproduces without human help, which means it’s found its groove in at least some parts of the continental United States.

Should You Grow It in Your Garden?

This is where we need to pump the brakes a bit. While floatingheart might sound like an intriguing addition to a water feature, there are several reasons to think twice:

  • Limited information: There’s surprisingly little detailed information available about this specific species’ behavior, growth habits, or ecological impact
  • Non-native status: Since it’s not native to most of the continental U.S., we don’t fully understand how it might interact with local ecosystems
  • Unknown invasive potential: Without clear data on its invasive status, it’s difficult to predict whether it might spread aggressively

Better Alternatives for Your Water Garden

Instead of taking a gamble on this mysterious floatingheart, consider these native aquatic alternatives that will provide beauty without the uncertainty:

  • American lotus (Nelumbo lutea): A stunning native water lily with large, fragrant flowers
  • Fragrant water lily (Nymphaea odorata): Classic white flowers with incredible fragrance
  • Spatterdock (Nuphar advena): Yellow flowers and heart-shaped leaves
  • White water lily (Nymphaea tuberosa): Large white blooms perfect for larger ponds

If You’re Determined to Try It

Should you decide to experiment with floatingheart despite the unknowns, here’s what we do know:

  • It requires consistently wet conditions – think bog gardens or water features
  • As an obligate wetland plant, it won’t tolerate dry periods
  • It’s a perennial, so it should return each year if conditions are right
  • Monitor it closely for any signs of aggressive spreading

The Bottom Line

While the name floatingheart certainly sounds romantic and garden-worthy, Nymphoides humboldtiana remains something of a botanical mystery. With limited information about its garden behavior and potential ecological impact, it’s probably wise to admire it from afar and choose well-documented native alternatives for your aquatic gardening adventures.

Remember, the best gardens are built on plants we understand – and right now, this floatingheart is keeping its secrets a little too well for comfort. Your local ecosystem (and your peace of mind) will likely thank you for choosing native alternatives that have proven track records in home landscapes.

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

Great Plains

OBL

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

Floatingheart

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

Solanales

Family

Menyanthaceae Dumort. - Buckbean family

Genus

Nymphoides Hill - floatingheart

Species

Nymphoides humboldtiana (Kunth) Kuntze - floatingheart

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