Pond plants are the foundation of a healthy garden pond.
They provide shelter for wildlife, help keep water clear, reduce algae growth and make a pond look more natural. Whether you have a small patio pond, a formal garden pond or a large wildlife pond, the right mix of plants will make a big difference.
Many new pond owners focus on fish, pumps and filters. These can all help, but plants often do more to improve a pond than any piece of equipment.
In this guide, you’ll learn about the main types of pond plants, how many you need, how to plant them correctly, and which species are best for wildlife.
The best pond plants for UK ponds include Marsh Marigold (Caltha palustris), Water Forget-Me-Not (Myosotis scorpioides), Water Mint (Mentha aquatica), Hornwort (Ceratophyllum demersum), Water Lily (Nymphaea cultivars) and Purple Loosestrife (Lythrum salicaria).
A healthy pond should include a mixture of marginal plants, water lilies, deep water plants, oxygenating plants, floating plants and bog plants. Each group does a different job.
A healthy pond needs plants.
In nature, ponds are rarely bare. Plants grow around the edges, beneath the water and across parts of the surface. Together, they create shelter, shade and a more stable environment.
Pond plants help by:
A well-planted pond is usually easier to manage than a pond with very few plants.
Most pond plants fit into six main groups:
Each group has a different role. A good pond planting plan usually includes several of them.
Marginal pond plants grow around the shallow edges of a pond.
They are usually planted with the crown at or just below water level. Most prefer between 0cm and 15cm of water above the basket.
Marginal plants add height, colour and structure. They also help wildlife move safely in and out of the pond.
Good marginal pond plants include:
Marginal plants are some of the most useful plants for wildlife ponds. Frogs and newts use them for cover. Dragonfly larvae use upright stems when they leave the water. Bees and other pollinators visit the flowers.
Water lilies are classic pond plants.
They grow from baskets placed below the water and send floating leaves to the surface. Most also produce flowers from late spring to early autumn.
Water lilies help by:
Water lilies belong to the genus Nymphaea.
Choose the right size for your pond. Dwarf water lilies suit small ponds and container ponds. Larger varieties need deeper water and more space.
As a guide, aim for floating leaves to cover around 50% to 70% of the pond surface in summer.
Deep water plants grow from the bottom of the pond and send leaves or flowers to the surface.
They are usually grouped with water lilies, but they are useful in their own right. Many have floating leaves, but they are not true water lilies.
Good deep water plants include:
Water Hawthorn (Aponogeton distachyos) is useful because it can flower during cooler months. This gives the pond interest when many other plants are dormant.
Yellow Water Lily (Nuphar lutea) is a strong native deep-water plant. It suits larger ponds best.
Fringed Water Lily (Nymphoides peltata) produces yellow flowers with fringed petals. It gives good surface cover and looks different from a standard water lily.
Oxygenating plants grow mainly under the water.
Many people think they only add oxygen. They do release oxygen during daylight, but their bigger value is nutrient uptake and wildlife cover.
Oxygenating plants help by:
Good oxygenating plants include:
Hornwort (Ceratophyllum demersum) is one of the easiest oxygenating plants to use. It does not need potting and can be placed directly into the pond.
Floating plants sit on the surface and do not need planting baskets.
They are useful when you want fast shade and quick nutrient uptake.
Good floating plants include:
Floating plants can be very useful, but they need managing.
Duckweed (Lemna minor) can spread quickly. It can be useful in wildlife ponds, but it may become a nuisance in smaller formal ponds.
Water Lettuce (Pistia stratiotes) is not frost hardy in the UK. Treat it as a summer plant and remove it before hard frosts.
Water Soldier (Stratiotes aloides) is a fascinating native floating plant. It sinks during winter and rises again in spring.
Bog plants grow in wet soil rather than standing water.
They are ideal for pond edges, bog gardens, stream sides and damp planting areas.
Good bog plants include:
Bog plants often provide strong colour around the pond. They are also excellent for bees, butterflies and hoverflies.
Most new ponds are underplanted.
If you want a healthy pond, plant generously from the start. You can always thin plants later.
These numbers may sound high, but plants are part of the pond’s natural balance.
A pond with too few plants often struggles with algae, green water and exposed edges.
Small ponds need compact plants.
Avoid large, vigorous species unless you are happy to divide them regularly. You can also read our full guide to pond plants for small ponds.
Good choices for small ponds include:
Miniature Bulrush (Typha minima) is much better for small ponds than larger bulrush species. It gives upright structure without taking over as quickly.
If you want a wildlife pond, plant a mix of submerged, marginal, floating and bog plants.
Different animals use different parts of the pond.
These plants provide nectar and pollen:
These plants provide cover, egg-laying sites and shelter:
These plants provide perches and emergence points:
Yellow Flag (Iris pseudacorus) is especially useful in larger wildlife ponds. Its upright leaves give dragonfly larvae a strong route out of the water.
Birds use pond plants for cover, insects and nesting material.
Useful plants include:
These plants suit a wide range of UK ponds.
Marsh Marigold is one of the best early-flowering pond plants.
It produces bright yellow flowers in spring and suits pond edges, shallow shelves and damp ground.
Why grow it:
Water Forget-Me-Not is a reliable marginal plant with small blue flowers.
It works well around pond edges and wildlife ponds.
Why grow it:
Water Mint is a fragrant marginal plant with rounded flower heads.
It is highly attractive to bees and other pollinators.
Why grow it:
Creeping Jenny is a low-growing plant that trails over pond edges.
Why grow it:
Flowering Rush is a graceful native marginal plant with pink flowers held above narrow leaves.
Why grow it:
Miniature Bulrush is a compact bulrush for smaller ponds.
Why grow it:
Yellow Flag is a bold native marginal plant with yellow flowers.
Why grow it:
Water Avens is a moisture-loving plant with nodding pink flowers.
Why grow it:
Brooklime is a creeping native marginal plant with blue flowers.
Why grow it:
Lesser Spearwort is a compact marginal plant with yellow flowers.
Why grow it:
Water lilies provide shade, flowers and surface cover.
Why grow them:
Water Hawthorn is a deep water plant with white scented flowers.
Why grow it:
Yellow Water Lily is a strong native deep water plant.
Why grow it:
Fringed Water Lily is a deep water plant with fringed yellow flowers.
Why grow it:
Hornwort is a popular submerged oxygenating plant.
Why grow it:
Water Crowfoot is a native oxygenating plant with white flowers.
Why grow it:
Spiked Water Milfoil is a submerged oxygenating plant with fine feathery leaves.
Why grow it:
Willow Moss is a native aquatic moss.
Why grow it:
Frogbit is a native floating plant with rounded leaves.
Why grow it:
Duckweed is a tiny floating plant that spreads quickly.
Why grow it:
Use it carefully. It can cover small ponds very quickly.
Water Lettuce is a floating plant with soft green rosettes.
Why grow it:
It is not frost hardy in the UK.
Water Soldier is a native floating plant with spiky rosettes.
Why grow it:
Purple Loosestrife is a tall bog plant with purple flower spikes.
Why grow it:
Ragged Robin is a native wildflower for damp ground.
Why grow it:
Japanese Primrose is a colourful bog plant for moist soil.
Why grow it:
Good spring pond plants include:
Good summer pond plants include:
Good autumn pond plants include:
Most pond plants slow down in winter.
Water Hawthorn (Aponogeton distachyos) is one of the best choices for cooler months. It can flower from autumn through spring in mild weather.
Correct potting helps pond plants establish well.
Pond plants should not be potted in the same way as ordinary garden plants.
Use aquatic baskets rather than solid pots.
Aquatic baskets allow water to move through the compost and around the roots.
General basket sizes:
Do not use normal multi-purpose compost.
It is often too light and may contain fertilisers that encourage algae.
Use:
Place the plant in the basket and firm the compost around the roots.
Do not bury the crown too deeply.
For marginal plants, the crown should usually sit at or just below water level once the basket is placed in the pond.
Some plants establish better if you lower them in stages.
Start them on a shallow shelf, then move them deeper once they begin to grow.
This is especially useful for water lilies and deep-water plants.
You can plant directly into a pond if it has natural soil shelves.
This works well in wildlife ponds.
For most garden ponds, baskets are easier.
Baskets help you:
This is the biggest mistake.
A few plants around the edge will not balance a pond.
Use enough plants from the start.
Normal compost can cloud the water and feed algae.
Use aquatic compost.
Many marginal plants fail because they are placed too deep.
Check each plant's recommended planting depth before adding it to the pond.
Large plants can quickly dominate small ponds.
Choose compact species for container ponds and smaller wildlife ponds.
Flowering plants often get all the attention, but oxygenating plants play an important role beneath the water surface.
Floating plants are useful, but too much coverage can block light from submerged plants.
Thin them regularly if they begin to cover large areas of the pond.
Green water is caused by microscopic algae suspended in the water.
It is common in new ponds and ponds with excess nutrients.
Common causes include:
Pond plants are one of the most effective natural ways to reduce green water.
To improve water clarity naturally:
New ponds often take time to reach a natural balance. Clear water rarely happens immediately.
Blanket weed is a stringy green algae that grows in long strands.
Unlike green water, blanket weed forms visible mats or threads.
It often appears when there is plenty of sunlight and excess nutrients available.
To reduce blanket weed:
If wildlife is using the blanket weed, avoid removing it all at once. Leave removed algae beside the pond for 24 hours so insects and other creatures can return to the water.
Spring is one of the best times to work on pond plants.
Jobs to do:
Summer is the main growing season.
Jobs to do:
Autumn is a good time to tidy the pond.
Jobs to do:
Most hardy pond plants require very little attention during winter.
Jobs to do:
Most marginal plants, bog plants and oxygenating plants do not need regular feeding.
Water lilies may benefit from aquatic fertiliser tablets during the growing season, particularly mature plants growing in baskets.
Avoid using standard garden fertilisers in ponds.
Excess nutrients can encourage algae growth.
Good beginner choices include Water Forget-Me-Not (Myosotis scorpioides), Marsh Marigold (Caltha palustris), Water Mint (Mentha aquatica), Hornwort (Ceratophyllum demersum) and Frogbit (Hydrocharis morsus-ranae).
Most ponds benefit from more plants than people expect. A small 2m x 2m pond should typically contain around 8 marginal plants, 1 water lily, 10 bunches of oxygenating plants and 5 bog plants.
Yes. Pond plants absorb nutrients, provide shade and compete with algae.
Most ponds benefit greatly from oxygenating plants, especially wildlife ponds and newly established ponds.
Most hardy pond plants sold in the UK survive winter and return in spring.
No. Water Lettuce (Pistia stratiotes) is not frost hardy and should be removed before winter.
No. Always use aquatic compost or heavy loam-based aquatic soil.
Not necessarily, but water lilies are one of the best plants for providing shade, reducing algae and adding summer colour.
Hornwort (Ceratophyllum demersum), Water Crowfoot (Ranunculus aquatilis), Water Forget-Me-Not (Myosotis scorpioides), Brooklime (Veronica beccabunga) and Frogbit (Hydrocharis morsus-ranae) are excellent choices.
Water Mint (Mentha aquatica), Purple Loosestrife (Lythrum salicaria), Flowering Rush (Butomus umbellatus), Water Avens (Geum rivale) and Pickerel Weed (Pontederia cordata) are all highly attractive to pollinators.
Yes. Native plants are excellent for wildlife, while carefully chosen non-native plants can extend the flowering season and add variety.
This guide was written by Gary Rolfe of Sarracenia House. I have worked with and sold pond plants for nearly 30 years and have helped thousands of gardeners choose plants for ponds of all sizes, from small container ponds to large wildlife ponds.
At Sarracenia House, we sell a wide range of pond plants for UK gardens, including oxygenating plants, marginal pond plants, water lilies, deep water plants, floating plants and bog plants. Our aim is to help gardeners create healthy ponds that look attractive, support wildlife and provide interest throughout the year.
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