North America Non-native Plant

Hydrocleys

Botanical name: Hydrocleys

USDA symbol: HYDRO6

Life cycle: perennial

Habit: forb

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

Hydrocleys: The Bright Yellow Water Poppy for Your Pond If you’ve been dreaming of adding some sunny charm to your water garden, you might have come across hydrocleys in your research. This cheerful aquatic plant brings tropical flair to ponds and water features with its bright yellow blooms and attractive ...

Hydrocleys: The Bright Yellow Water Poppy for Your Pond

If you’ve been dreaming of adding some sunny charm to your water garden, you might have come across hydrocleys in your research. This cheerful aquatic plant brings tropical flair to ponds and water features with its bright yellow blooms and attractive floating foliage. But before you dive in, let’s explore what makes this water-loving plant tick and whether it’s the right fit for your garden.

What is Hydrocleys?

Hydrocleys is a perennial forb that’s perfectly at home in aquatic environments. As a non-woody herbaceous plant, it lacks the thick stems of shrubs or trees, instead producing soft, lush growth that emerges from underwater roots. Think of it as nature’s way of decorating the water’s surface!

While you might see it simply called hydrocleys, this plant belongs to a group of South American natives that have found their way into water gardens around the world.

Where Does Hydrocleys Grow?

Originally from the tropical regions of South America, hydrocleys has established itself as a non-native species in several warm-climate areas of the United States. You’ll find it growing in Florida, Louisiana, Texas, and Puerto Rico, where it reproduces naturally without human intervention.

What Does Hydrocleys Look Like?

Picture heart-shaped leaves floating gracefully on the water’s surface, topped with cheerful yellow flowers that seem to glow in the sunlight. The blooms are the real showstoppers here – bright, sunny, and incredibly eye-catching against the green foliage. It’s like having little bursts of sunshine dancing on your pond!

Growing Hydrocleys: The Basics

If you’re considering adding hydrocleys to your water feature, here’s what you need to know:

Ideal Growing Conditions

  • Shallow water environments (perfect for pond edges or bog gardens)
  • Full sun to partial shade
  • Warm temperatures year-round
  • USDA hardiness zones 9-11

Planting and Care Tips

  • Plant in shallow water areas of your pond or water garden
  • Ensure water temperatures remain consistently warm
  • Minimal maintenance required once established
  • May need winter protection in cooler zones

Benefits for Your Garden

Beyond its obvious visual appeal, hydrocleys offers some practical benefits too. The bright yellow flowers attract various pollinators, including bees and flies, adding life and movement to your water garden. It’s also relatively low-maintenance once established, making it a good choice for gardeners who want beautiful results without constant fussing.

Should You Plant Hydrocleys?

Here’s the thing – while hydrocleys isn’t currently listed as invasive or noxious, it is a non-native species that has shown it can establish itself in the wild. This means you’ll want to be thoughtful about your decision.

If you do choose to grow hydrocleys, be responsible about it. Keep it contained within your water feature and avoid letting it spread to natural waterways.

Native Alternatives to Consider

Before you settle on hydrocleys, consider exploring some native aquatic plants that could give you similar beauty while supporting local ecosystems:

  • Native water lilies for floating foliage and stunning blooms
  • Spatterdock (yellow pond lily) for yellow flowers and heart-shaped leaves
  • Pickerel rush for vertical interest and pollinator appeal
  • Duck potato for attractive foliage and white flowers

The Bottom Line

Hydrocleys can certainly add tropical charm to your water garden with its sunny blooms and floating foliage. It’s relatively easy to grow in the right conditions and offers some pollinator benefits. However, as a non-native species, it’s worth considering whether native alternatives might better serve both your garden goals and local wildlife. Whatever you choose, make sure it’s the right fit for your climate zone and garden style – and always garden responsibly!

Hydrocleys

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Alismatidae

Order

Alismatales

Family

Limnocharitaceae Takht. ex Cronquist - Water-poppy family

Genus

Hydrocleys Rich. - hydrocleys

Species

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