Swimming Pond Planting

How do I keep a natural swimming pond clean using plants?

Plants are the heart of a chemical-free swimming pond. Instead of relying on chlorine or UV systems, natural ponds stay clean through a regeneration zone, a planted area where oxygenators, marginals and floating plants absorb excess nutrients and shade the water, helping beneficial bacteria thrive. These bacteria and root systems work together to break down organic matter and keep the water balanced, clear and safe for swimming.

To be effective, you need enough plants. Under-planting is the most common mistake we see: people design a large pond, then run out of budget for the planted zone. It’s better to size your pond to match your planting budget than build big and hope a few plants will keep it clean - they won’t. A well-designed regeneration zone, often making up a significant portion of the pond, is essential to outcompete algae.

With the right mix of UK-grown oxygenators, marginals and floating plants, you can create a clean, wildlife-friendly swimming pond that feels like a natural lake - soft, living water without harsh chemicals.

Read our full guide to regeneration zones and natural filtration in our Swimming Pond blog.