Water plants can completely transform a pond or water feature. They bring movement, colour and life to a garden while also helping maintain a healthy aquatic ecosystem. The right plants can shade the water, reduce algae growth and create a natural habitat for frogs, birds and beneficial insects.
Whether you’re creating a large pond, a small courtyard water feature or a container water garden, choosing the right aquatic plants is essential for long-term success.
This guide covers some of the best water plants for Australian garden ponds.
Why water plants are important
Aquatic plants do much more than improve appearance. They help:
- Maintain healthy pond water
- Reduce algae growth
- Provide oxygen to the water
- Create habitat for wildlife
- Shade the pond and regulate temperature
A well-balanced pond usually includes a mix of floating, submerged and marginal plants. If the pond is part of a wider wildlife plan, our guide to creating an animal friendly garden covers what else brings frogs and birds in.
Types of aquatic plants
Understanding the different plant types helps create a balanced water garden.
Floating plants
Float on the surface and shade the water.
Submerged plants
Grow underwater and oxygenate the pond.
Marginal plants
Grow along pond edges in shallow water.
Water lilies
Root in soil underwater but float on the surface.
A combination of these plants keeps ponds healthy and visually appealing.
Best Water Plants for Australian Ponds
1. Water Lily (Nymphaea)
Water lilies are the most iconic pond plants. Their large floating leaves shade the water while beautiful flowers add colour to the garden.
Best for:
- Decorative ponds
- Reducing algae
- Creating a focal point
2. Water Lettuce (Pistia stratiotes)
A floating plant with soft rosette leaves that resemble lettuce. It spreads across the water surface and provides shade for fish.
Best for:
- Natural ponds
- Controlling sunlight
- Wildlife habitats
3. Duckweed (Lemna)
A tiny floating plant that spreads rapidly. While small, it plays an important role in absorbing excess nutrients from the water.
Best for:
- Natural ecosystem ponds
- Nutrient control
4. Azolla (Water Fern)
A floating fern that forms a red or green mat across the water surface. It helps shade the pond and reduce algae growth.
Best for:
- Wildlife ponds
- Natural water features
5. Vallisneria
A submerged aquatic plant that grows long ribbon-like leaves underwater.
Best for:
- Oxygenating ponds
- Fish habitat
6. Hornwort
One of the best oxygenating plants available. It grows completely underwater and helps keep water clear.
Best for:
- Maintaining pond health
- Reducing algae
7. Water Iris
A popular marginal plant that produces beautiful flowers along pond edges.
Best for:
- Pond borders
- Adding colour to water gardens
8. Cyperus (Umbrella Plant)
A striking marginal plant with umbrella-shaped foliage that adds structure to water features, alongside the strappy foliage covered in our guide to Lomandra longifolia care for the drier ground just beyond the water line.
Best for:
- Pond edges
- Tropical-style water gardens
9. Water Mint
A fragrant aquatic plant that grows along pond edges and spreads naturally.
Best for:
- Naturalistic ponds
- Wildlife gardens
10. Papyrus (Cyperus papyrus)
A dramatic water plant often used in larger ponds. Its tall stems create strong vertical interest.
Best for:
- Large water features
- Tropical landscapes
11. Pickerel Rush (Pontederia)
A flowering marginal plant that produces spikes of blue or purple flowers.
Best for:
- Decorative pond edges
- Pollinator gardens
12. Taro (Colocasia)
A tropical water plant with large dramatic leaves, closely related to the alocasias covered in our guide on how to care for elephant ear plants, which thrive in the permanently damp ground at a pond edge.
Best for:
- Tropical water gardens
- Large ponds
13. Canna Lily (Aquatic varieties)
Aquatic cannas thrive in shallow water and produce colourful flowers.
Best for:
- Pond edges
- Tropical water features
14. Water Poppy
A floating plant with delicate yellow flowers.
Best for:
- Decorative ponds
- Softening water surfaces
15. Water Hyacinth
A fast-growing floating plant with attractive purple flowers. It provides excellent water filtration.
Best for:
- Natural ponds
- Shading the water
How to plant aquatic plants
Most water plants are grown in aquatic planting baskets.
Basic steps:
- Fill a basket with aquatic soil or pond mix.
- Place the plant in the container.
- Cover the soil with gravel to stop it floating away.
- Lower the basket into the pond at the correct depth.
Different plants prefer different water depths, so always check their requirements.
Tips for a healthy pond ecosystem
For a balanced water garden:
- Shade 50–60% of the water surface
- Combine floating, marginal and submerged plants
- Avoid overcrowding the pond
- Remove dead foliage regularly
- Maintain consistent water levels
Healthy aquatic plants naturally help keep pond water clear.
Small water garden ideas
You don’t need a large pond to grow water plants.
A simple water garden can be created using:
- A ceramic pot or barrel
- A dwarf water lily
- One marginal plant
- A floating plant
This type of setup works perfectly for patios, balconies or small courtyards, and our roundup of small courtyard garden ideas covers how to place it so the space still feels open.
Final thoughts
Water plants bring beauty and balance to any pond or water feature. By selecting a mix of floating plants, oxygenators and marginal plants, you can create a thriving aquatic garden that looks stunning while supporting wildlife.
With the right plant selection and simple maintenance, a water garden can become one of the most peaceful and visually striking features in your landscape, and it pairs naturally with the planting described in our guide to designing a tropical garden that looks lush year-round.
A note on invasive species
Several fast-spreading floating plants, including water hyacinth and salvinia, are declared weeds in parts of Australia and must never be released into or near natural waterways. Check the rules for your state before adding any floating plant to a pond, keep the water body fully contained, and dispose of thinnings in the green bin or compost rather than a drain or creek. Choosing locally appropriate marginal and submerged species gives you the same clarity and habitat benefits without the risk.
Ready to plant?
Most of what makes a pond look established is actually the planting around it rather than in it. Browse our high water plants for the species that thrive in permanently damp ground, and our tropical garden plants for the broad leaves and strappy foliage that frame a water feature.
