Floodwater as a Design Opportunity: Working with Water in a Changing Climate

This winter has been a clear reminder that gardens are living systems. Weeks of

persistent rainfall have left many landscapes saturated, exposing weaknesses in

drainage, soil structure and surface treatments. Yet water need not be seen as a

threat. When approached intelligently, it becomes a powerful design tool, shaping landform, enriching biodiversity and strengthening long-term resilience.

As weather patterns grow more unpredictable, gardens must be designed not just for moments of sunshine but for prolonged rain, sudden downpours and seasonal extremes. Thoughtful water management is no longer an add-on; it is

fundamental to enduring design.

Slowing the Flow

Modern gardens often struggle because water moves too quickly. Hard surfaces

shed rainfall into already pressured drainage systems, while compacted soils

prevent natural absorption. The result is standing water, erosion and plant stress.

By contrast, slowing water as it moves through a landscape allows it to filter

slowly and replenish aquifers. Gentle level changes, permeable materials and

strategically positioned planting beds all contribute to this quieter, more

regenerative process.

At our National Trust project Garden for the Future at Sheffield Park and Garden, the landform was carefully shaped to manage rainfall as part of the design narrative. Beds were subtly mounded and incorporated recycled crushed brick to improve permeability, encouraging infiltration while adding warmth and texture to the planting palette. Water movement informed both aesthetics and ecology, demonstrating how functional strategies can be integrated into a contemporary landscape.

Shaping the Land

Topography is one of the most powerful tools in water management. Even subtle

changes in level can determine how water moves through and is managed within the site.

On a coastal wildlife garden within the Chichester Harbour Conservancy, heavy

clay soil and exposure to the elements required a careful response. Rather than

relying solely on hidden drainage infrastructure, the solution lay in shaping the

ground itself. A series of scrapes and mounds were introduced to hold and guide

water, creating seasonal variation in moisture levels. These shifts support diverse

planting communities and enhanced habitat value, while resolving practical

drainage challenges.

The result is not only a functioning landscape, but one with rhythm, ecological

richness and visual depth. We’re incredibly excited to see how this garden evolves over the years.

Planting for Resilience

Plants are among the most effective water managers in the garden. Their roots

slow runoff, stabilise soil and filter impurities. Dense, layered planting increases

infiltration while providing habitat for pollinating insects, birds and even

amphibians.

In an era of climatic unpredictability, selecting species that tolerate both winter

saturation and summer drought are increasingly important. Moisture-loving plants can be positioned in lower-lying areas where water naturally gathers, while more drought-tolerant species occupy higher ground. This approach creates dynamic planting schemes that respond naturally to the landscape’s hydrology.

Designing with these natural gradients, rather than fighting them, builds gardens

capable of adapting over time.

Materials that Breathe

Surface choices also play a crucial role. Replacing impermeable paving with

gravel, open-jointed setts or porous finishes allows rainwater to return to the soil,

reducing runoff and supporting healthy ground conditions.

In our projects, water management is rarely a visible intervention. It is embedded

from the outset – shaping levels, informing material choices and guiding planting

strategy. When done well, it becomes invisible, experienced only as a garden that

feels balanced and enduring.

A Garden for the Future

Gardens that celebrate natural processes will always prove more resilient than

those that resist them. By slowing water, shaping land thoughtfully and selecting

adaptable planting, we create landscapes that give back – to wildlife, to local

ecosystems and to the people who inhabit them.

As climate patterns shift, the fundamentals of good design matter more than

ever. Working with water, rather than against it, allows gardens to remain places

of abundance and life – come rain or shine.