How to Design a Drought-Tolerant Garden in the UK

By Ian Green, Pre-Registered Member of the Society of Garden & Landscape Designer

A garden that struggles every summer doesn't necessarily need more watering. It usually needs better decisions.

Longer dry spells and hotter summers are changing what we can expect from a garden. Plants that once managed perfectly well start to struggle. Lawns lose their colour. Borders need more attention than they used to. Watering becomes another job to keep on top of.

The instinct is to solve each problem on its own. Water more. Swap out the plants that are failing. Add irrigation.

I think it's better to step back and look at the garden as a whole. A drought-tolerant garden isn't simply one filled with drought-resistant plants. It's a garden designed around its conditions, so the soil, the planting, the layout and the way water is used all work together. Good design takes out the guesswork.

Start with the garden, not the plant list

The easiest mistake to make is choosing plants before you've understood the site.

Before I think about planting, I want to know what the garden is actually doing. Where does it get the most sun, and which areas dry out first? Where does water naturally collect? What's the soil like? Which parts of the garden need to work hardest, and where might planting create useful shade or shelter? And, just as importantly, how much time does the owner actually want to spend looking after it.

There isn't one formula, because there isn't one type of British garden. A sunny, free-draining plot needs a different response from heavy clay, a sheltered courtyard or a garden shaded by mature trees. The aim isn't to fight those conditions. It's to design around them.

Improve the soil first

Planting gets most of the attention, but what happens underneath it matters just as much.

Sandy, free-draining soils can lose moisture quickly. Adding organic matter improves their ability to hold water and support healthy roots. Clay soils are a different problem. They can hold water well when it's wet, then become hard and difficult for water to penetrate once a dry spell sets in.

In both cases, improving the soil structure before you plant gives everything a better chance of establishing properly. It isn't the most exciting part of a project, but it's often the decision that determines how well everything else performs.

Use mulch to protect what's already there

A generous layer of mulch over planting areas reduces moisture loss from the soil surface. It suppresses weeds, moderates soil temperature, and gradually improves the soil as it breaks down.

Ideally, mulch goes on while the soil still has some moisture in it, rather than after it's already dried out. It's a simple intervention, but a lot of good gardens are built on sensible decisions like this one rather than anything complicated.

Question how much lawn you actually need

Lawn isn't inherently wrong. If you've got children who play outside, or you enjoy sitting on the grass, or you simply love the openness it creates, it can earn its place.

But it's worth asking how much you genuinely need. A large area of closely cut grass takes a lot of water and maintenance if the expectation is that it stays green through a dry summer. Reducing it opens up space for deeper planting, paths, seating, trees or wildflower areas that contribute more to how the garden actually gets used.

I've designed gardens where taking the lawn out completely was the right call, and others where a generous lawn was central to family life. The answer depends on the people and the place, and that's the difference between following a rule and designing a garden.

Choose plants for the conditions you actually have

Plenty of plants can cope with dry conditions, but drought tolerance on its own isn't a reason to choose one. It still needs to suit the soil, the light and the character of the rest of the garden.

Mediterranean species are a reasonable starting point for sunny, free-draining sites. Ornamental grasses and prairie-style perennials can also do well through a dry summer. Lavender, for instance, is reliable in sunny, well-drained soil and gives you a long flowering period. A grass like Stipa gigantea adds height and structure, with flower heads that catch the light late in the season.

But there's no universal list, and I'd be cautious of anyone offering one. The aim is a planting scheme where the plants are comfortable in the conditions they've been given, rather than one that depends on you constantly intervening to keep it alive.

For information see my journal - Right Plant for the Right Place

Group plants by their water needs

Putting plants with similar requirements together makes a garden much easier to manage. There's little point placing something that prefers dry conditions right next to something that needs consistently moist soil, and then trying to keep both happy.

Instead, the planting can respond to the natural variation across a site. Areas that hold more moisture support one kind of planting, hotter and drier spots support another. This usually makes the garden feel more natural too, because the design is responding to the landscape rather than imposing the same conditions everywhere.

Does a drought-tolerant garden still need watering?

Yes, particularly while new plants are establishing. Drought tolerant doesn't mean drought proof from the day something goes in the ground. New planting needs time to build a healthy root system, and it will usually need supplementary watering during that period.

Where irrigation is needed, a well-designed drip system delivers water close to the root zone instead of spraying it across the whole garden. The longer-term aim is for plants to become established enough to cope with normal rainfall variation with much less help from you.

Think about shade as part of the design

Drought-tolerant design isn't only about water. It's also about managing heat. Trees, shrubs and

structures like pergolas create shade and reduce exposure, for the plants and for the people using the garden.

A well-positioned tree can change the character of a garden over years. It provides shelter, creates somewhere comfortable to sit, and helps form a more varied environment underneath it. This is where thinking beyond individual plants starts to matter. The garden works as a system, not a collection of separate choices.

Can a drought-tolerant garden still feel green and lush?

Yes, and this is a misconception worth challenging. Making a garden more resilient to dry weather doesn't mean giving up softness or seasonal change. A combination of trees, shrubs, grasses and perennials creates layers of foliage and texture that still suit a lower-rainfall climate.

The better question isn't “will this plant survive without much water.” It's “does this plant belong here.

Designing for the garden you actually have

Drought-tolerant design isn't really about achieving a particular look. It's about making better decisions so the garden is more resilient.

That might mean improving the soil. It might mean reducing a lawn that isn't earning its space. It could mean introducing trees for shade, changing the planting palette, or reconsidering how different parts of the garden get used. Usually it's a combination of small decisions rather than one dramatic solution, which is why I'd rather start with the whole garden than a list of drought-resistant plants.

If your garden is becoming harder to manage through dry summers, it may be worth looking at the design before adding more irrigation. If you're not sure where to start, that's a perfectly reasonable place to begin.

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Frequently asked questions

What is a drought-tolerant garden?

A garden designed to cope with extended dry periods without depending on frequent watering. This usually involves plants suited to the site, improved soil, protected soil moisture, and a design where water is used efficiently.

Do drought-tolerant plants need watering?

Yes, particularly when newly planted, while root systems establish. Once established, they should need considerably less

Do I need to remove my lawn to make my garden drought tolerant?

No. Lawn can stay where it has a genuine purpose. The useful question is whether the amount you have suits how you use the garden and how much maintenance and watering you're comfortable with.

Can a drought-tolerant garden still have lots of planting?

Yes. Choosing plants suited to the soil, aspect and available moisture lets you plant generously without relying on constant watering.

Are Mediterranean plants suitable for UK gardens?

Many are, particularly in sunny, sheltered, free-draining spots. Winter wet and cold matter as much as summer drought when choosing plants for UK conditions, so the individual site should guide the decision.

Is gravel necessary in a drought-tolerant garden?

No. It's one useful approach, not a requirement. Drought tolerance comes from the relationship between soil, planting, water management and design, not from any particular material

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About the author: Ian Green is a garden and landscape designer with over 25 years' experience, working with clients across Lincolnshire, East Midlands and beyond. He believes that the best gardens start with listening to the space, and to the people who'll live in it