Waterlogged gardens are a common problem across the clay soils of the Test Valley, the New Forest fringes and many parts of Dorset and Wiltshire. Standing water, muddy lawns and plants dying of root rot are all signs of a drainage problem that will not resolve itself without intervention. The good news is that there are reliable solutions.
Diagnosing the Problem
Before committing to a solution, understand the cause. Waterlogging can result from impermeable clay, a compacted layer beneath the surface (a "pan"), a high water table, or inadequate fall across the garden.
- Dig a test hole 60cm deep — does water collect within 24 hours?
- Check for a compacted pan 20–30cm below the surface
- Assess the natural fall of the garden — where does water want to go?
- Check if the problem is seasonal or year-round
- Look for any blocked drains or restricted outfalls
Drainage Solutions
Depending on the cause, solutions range from simple aeration and sand incorporation for minor problems, through to French drains, soakaways and piped drainage systems for serious waterlogging. A French drain — a gravel-filled trench with a perforated pipe — is one of the most effective and cost-efficient solutions for most Hampshire gardens.
Improving Soil Structure
In clay soils, incorporating sharp grit and organic matter at depth can dramatically improve drainage over time. On a larger scale, land drains or a soakaway filled with rubble can provide a route for excess water to escape the garden entirely.
A&T Landscapes installs French drains, soakaways and other drainage solutions across Hampshire, Dorset and Wiltshire. Call 07735 916029 for a drainage assessment.