Water Grass (Lilaeopsis brisbanensis) with floating ring

Australian Native | Perennial | Mat Forming | Excellent Frog & Fish Habitat

Water Grass (Lilaeopsis brisbanensis) is a beautiful Australian native pond plant that brings lush, vibrant green foliage and a natural grass-like appearance to your water garden.

This low-growing, mat-forming plant is ideal for shallow ponds, wildlife ponds and frog ponds, where its dense growth provides valuable shelter and habitat for small fish, frogs, tadpoles and other aquatic creatures.

Water Grass is shade tolerant and adaptable, growing from part shade through to full sun. It can be grown in shallow water up to approximately 5cm deep, or allowed to spread across the surface when planted in a floating pond plant ring.

If you're looking for an easy-care native plant that creates a beautiful carpet of green while adding habitat and structure to your pond, Water Grass is an excellent choice.

Why Grow Water Grass in Your Pond?

Water Grass is one of those plants that quietly makes a big difference to the overall appearance and habitat value of a pond.

Its fine, grass-like foliage forms a lush green mat, creating a softer, more natural appearance than bare pond edges or exposed liner.

It is particularly valuable in wildlife and frog ponds, where the dense growth provides shelter for small aquatic animals and gives tadpoles somewhere to hide and develop.

When grown in a floating pond plant ring, Water Grass can spread across the surface, creating a natural mat of foliage that provides excellent cover for fish and other pond life.

Water Grass Pond Plant Features

• Botanical name: Lilaeopsis brisbanensis
• Common name: Water Grass
• Plant type: Perennial aquatic plant
• Origin: Australia
• Position: Part shade to full sun
• Flowers: No
• Water depth: Up to approximately 5cm
• Foliage: Fine, grass-like foliage forming a dense mat
• Growth habit: Low-growing and mat forming
• Cover: Excellent cover when grown in a floating pond plant ring
• Oxygenator: No
• Best suited to: Shallow ponds, frog ponds, wildlife ponds and floating pond plant rings

Growing Water Grass

Water Grass is a low-growing, mat-forming aquatic plant that gradually spreads to create a lush carpet of green.

Its fine foliage gives it a grass-like appearance, making it particularly effective when you want to create a natural-looking pond rather than relying entirely on taller marginal plants.

It can be planted in shallow water or grown in a floating pond plant ring, where the foliage is able to spread naturally across the surface.

Once established, Water Grass can create a dense mat that provides both visual interest and valuable habitat for pond life.

Position

Water Grass is highly adaptable and can grow in part shade through to full sun.

It is a particularly useful choice for ponds where conditions vary throughout the day, as it can tolerate some shade while still performing well in sunnier positions.

For the strongest, lushest growth, provide plenty of natural light while ensuring the plant has access to consistent moisture.

A Fantastic Australian Native Pond Plant

One of the biggest reasons to grow Water Grass is its Australian native origins.

Using native plants in your water garden can help create a pond environment that feels more natural and provides suitable habitat for local wildlife.

Water Grass combines beautifully with other Australian native pond plants, including rushes, sedges, flowering marginals and floating plants.

For a wildlife-friendly pond, consider following our 3-2-1 planting approach — three oxygenating plants, two marginal plants and one flowering plant for each square metre — and use Water Grass to add low-growing habitat and surface cover.

Excellent Habitat for Frogs, Fish & Tadpoles

Water Grass is particularly useful in frog-friendly ponds.

Its dense mat-forming growth creates shelter and structure around the water's surface, providing small fish, frogs, tadpoles and other aquatic creatures with places to hide.

For frog ponds, Water Grass can help create the type of dense, planted environment that makes a pond more attractive to wildlife.

The foliage also provides additional structure around spawning areas and gives young aquatic life protection from open water.

When grown in a floating pond plant ring, the plant can spread across the surface to create a natural floating habitat.

Water Grass as a Mat-Forming Plant

Unlike upright rushes and taller marginal plants, Water Grass stays low and spreading, making it ideal for creating a carpet of greenery.

Its fine leaves create a soft, grass-like texture that works particularly well around the margins of a pond or when allowed to spread across the water.

Use Water Grass to:

• Add lush green colour to your pond
• Create low-growing structure
• Soften the appearance of pond edges
• Provide shelter for small aquatic creatures
• Create habitat for frogs and tadpoles
• Add surface cover when grown in a floating pond plant ring

Is Water Grass an Oxygenating Plant?

Water Grass is not classified as an oxygenating pond plant.

Although it grows in and around water and contributes to a healthy planted pond environment, it should not be relied upon for underwater oxygenation.

For a balanced pond, combine Water Grass with dedicated oxygenating plants such as Hornwort, Vallisneria or other suitable oxygenating species.

Planting Water Grass in Your Water Garden

Water Grass is ideal for shallow areas of the pond where the plant can remain consistently moist.

It can be grown:

• In shallow water up to approximately 5cm deep
• Around pond margins
• In wildlife and frog ponds
• In shallow water bowls
• In floating pond plant rings
• Along natural pond edges
• As a low-growing companion to taller marginal plants

When planted in a floating pond plant ring, simply position the plant securely and allow its foliage to spread naturally across the water's surface.

Combining Water Grass with taller native rushes and flowering pond plants creates layers of planting, providing a more diverse and natural habitat for pond life.

Feeding Water Grass

For healthy, vigorous growth, Water Grass benefits from nutrients within the growing medium.

During the active growing season, a suitable slow-release aquatic fertiliser tablet can be used according to the manufacturer's instructions.

Avoid over-fertilising, particularly in smaller ponds, as excess nutrients can contribute to unwanted algae growth.

Create a Natural Australian Water Garden

Water Grass is a simple way to introduce lush native greenery, low-growing structure and valuable habitat into your pond.

Its ability to form a dense mat makes it particularly useful for frog ponds, wildlife ponds and ponds containing small fish, while its adaptability to part shade and full sun makes it an easy plant to incorporate into a wide range of water gardens.

Add Water Grass (Lilaeopsis brisbanensis) to your pond and enjoy a beautiful Australian native mat-forming plant that provides shelter, habitat and a lush green finish.

Learn more here: The Beauty of Brisbane Water Grass: A Low-Maintenance Australian Native for Your Pond