Whether you are creating a new pond or refreshing an existing one, planting plays the central role in helping the water settle into a healthy rhythm.

This guidance is designed for pump-free, filter-free ponds without fish, where plants provide the primary clarity and stability. If your pond includes fish, mechanical filtration or aeration, planting density and surface cover may need to be adjusted — see the notes below.

A few simple principles help most ponds thrive.

• Aim for around 60 to 70 percent surface cover in summer from lilies and floating plants, while keeping some open water visible.
• Use generous oxygenating plants — many grow beneath the surface and some sit closer to it — to support oxygen balance and nutrient uptake.
• Marginals often look best when planted in small groups rather than evenly spaced singles around the edge.
• If you are selecting water lilies or other deep-water plants, placement and planting depth matter — see our Deep Water Planting Guide for detailed advice on positioning and care.

There is no single correct planting for every pond. Finding the right balance will depend on depth and shape, natural light, the look you want to achieve, your budget, and how you use the space.

Some prefer a lightly planted pond with more open water. Others prefer a fuller, more immersive feel. Both can work beautifully when planted thoughtfully, and both can provide a welcome haven for wildlife.

In our experience, it is usually easier to begin with enough planting and adjust gently over time than to correct a sparsely planted pond later.

Up to 1m² (Container Pond)

• 1 miniature water lily
• 3 to 4 marginal plants
• 5 oxygenating plant bunches
• 1 to 2 potted oxygenators
• 0 to 1 deep marginal, if depth allows
• 1 floating plant, optional

2m² Pond (Container or small in-ground pond)

• 1 small water lily
• 6 to 8 marginal plants
• 10 oxygenating bunches
• 2 to 3 potted oxygenators
• 1 to 2 deep marginals
• 1 to 2 floating plants

4m² Pond

• 1 small or 1 medium water lily
• 10 to 12 marginal plants
• 15 to 20 oxygenating bunches
• 3 to 4 potted oxygenators
• 2 to 3 deep marginals
• 2 to 3 floating plants

6m² Pond

• 1 medium water lily, or 1 large lily if depth exceeds 80 cm and a stronger focal point is desired
• 14 to 16 marginal plants
• 25 to 30 oxygenating bunches
• 4 to 5 potted oxygenators
• 3 to 4 deep marginals
• Around 3 floating plants

8m² Pond

• 1 to 2 medium water lilies, or 1 large
• 18 to 20 marginal plants
• 30 to 40 oxygenating bunches
• 5 to 6 potted oxygenators
• 4 to 5 deep marginals
• 3 to 4 floating plants

10m² Pond

• 1 large water lily or 2 medium
• 22 to 26 marginal plants
• 40 to 50 oxygenating bunches
• 5 to 7 potted oxygenators
• 5 to 6 deep marginals
• Around 4 floating plants

12m² Pond

• 1 large water lily or 2 medium
• 26 to 30 marginal plants
• 50 to 60 oxygenating bunches
• 5 to 8 potted oxygenators
• 6 to 7 deep marginals
• 4 to 5 floating plants

If Your Pond Contains Fish

Fish change the balance of a pond. They produce waste, disturb sediment and may nibble certain plants. A planted pond is still entirely possible, but the approach shifts slightly.

Goldfish and lightly stocked ponds

Goldfish are generally compatible with planting, though they may disturb loose baskets and graze softer growth. Keep some open surface water visible rather than allowing full summer coverage. Ensure baskets are well rooted and secure before introducing fish. Avoid very delicate, fine-stemmed plants in heavily stocked ponds. Maintain a good presence of oxygenating plants, as fish increase nutrient levels.

Koi ponds

Koi are larger and more active. They commonly uproot or consume plants. In many koi ponds, filtration systems manage much of the water clarity. Planting may be limited to protected shelves or contained zones. Surface coverage is usually lower, and secure baskets or physical barriers are often required. Koi ponds can include planting, but the design is typically more controlled.

If You Use Pumps, Filters or UV Clarifiers

Mechanical systems can support clarity, particularly where fish are present. They do not replace the ecological role of plants.

Plant-led ponds (no pump or filter)

In a pump-free, filter-free pond, planting carries most of the responsibility for nutrient uptake, shade, oxygen balance and habitat. This is why the planting guidance above is relatively generous.

Ponds with pumps and biological filters

Where filtration is installed, mechanical systems assist with waste processing. The pond may rely slightly less on dense oxygenator planting, and surface cover can be adjusted according to flow and aesthetic preference. Plants remain essential for long-term stability and wildlife value.

Ponds with UV clarification

UV units can reduce green water quickly, but they do not remove underlying nutrients. Plants continue to play a central role in nutrient absorption, cooling and habitat support.

A thoughtfully planted pond, whether small or large, tends to settle more easily than one that begins sparsely. As plants mature, you may thin or reposition them, but this is usually gentle seasonal care rather than constant management. The goal is not perfection on day one, but giving your pond enough planting to find its balance over time.

Related Guides

• Balanced Pond Planting Guide
• Planting Zones Guide
• Deep Water Planting Guide