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Ponds are a lovely addition to any garden and can provide a rich habitat for a range of wildlife. However, without care ponds can soon become an eyesore with overgrown plants, weeds and water that is unhealthy for fish and other wildlife. Occasional cleaning and regular maintenance are required.
Removing blanket weed from a pond. Credit: RHS/Advisory.
All ponds need regular maintenance to prevent them silting up and turning into bog gardens.
Small ponds need a complete overhaul to remove debris every five years, while large ponds need thorough cleaning every 10 years.
The best time to clean ponds is in late autumn when many creatures are less active.
After cleaning out the pond, it can take several months or years to return to a balanced ecosystem.
In late spring, pond algae and weed growth can be rife. There are various ways of controlling and preventing these problems. If you have a large pond with a serious weed or algal problem, then you may choose to contact a contractor or specialist centre for advice.
Centre for Aquatic Plant Management
National Association of Agricultural Contractors (NAAC)
Aquatic plants: planting
Algae in ponds
Bog gardens: plants for
Pond construction and repair
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The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.