Creating a Mediterranean Garden for Britain's Hotter Summers

Perhaps the answer to a brown summer garden isn't more water—but different plants.

There is something slightly dispiriting about looking out across a British garden in the middle of a hot, dry summer.

The lawn has turned from green to straw. Hanging baskets need watering almost every day. Plants that looked magnificent in May are drooping by the afternoon, and every trip around the garden seems to involve another watering can or hosepipe.

The traditional response has been simple: add more water.

But perhaps we need to ask a different question.

What if we changed the garden instead?

Not by trying to turn Hertfordshire, Kent, Yorkshire or anywhere else in Britain into Provence, but by borrowing some of the principles that make Mediterranean gardens work: drought-tolerant planting, shade, gravel, aromatic plants, less lawn, careful use of water and, above all, putting the right plant in the right place.

That distinction matters.

A successful British "Mediterranean garden" should really be a Mediterranean-style garden using plants capable of surviving a British winter.

That may become increasingly useful. Met Office climate projections point towards hotter, drier summers alongside warmer but wetter winters, with more extremes of heat and heavy rainfall. In other words, our gardens increasingly need to cope with summer drought and winter wetness at the same time.

That is a rather different gardening challenge.

The Great British Gardening Contradiction

It is tempting to think that climate change simply means Britain is becoming warmer and that we should therefore start growing plants from hotter countries.

Unfortunately, it isn't that simple.

A plant may happily tolerate:

30°C sunshine;
several weeks without rain;
dry, stony soil;
blazing afternoon sun.

Then January arrives.

Its roots sit in cold, saturated clay for several weeks and the plant dies.

The culprit may not actually have been the frost. It may have been the combination of cold and waterlogged soil.

That is why drainage is perhaps the single most important principle behind creating a Mediterranean-style British garden.

The RHS repeatedly stresses this point with plants such as lavender, rosemary, thyme and sage. Rosemary is hardy through much of Britain but prefers warmth and free-draining soil; thyme is better in a raised bed or container where winter soil remains wet; sage can suffer root rot in poorly drained winter conditions.

So our objective is not:

"Which Mediterranean plants can I buy?"

It is:

"Which plants give me the appearance and drought tolerance I want while surviving the conditions in my own garden?"

That subtle change in thinking can save a great deal of money and disappointment.

Start With the Soil, Not the Plants

We tend to start garden projects at the garden centre.

I would start with a spade.

Dig a hole in the area you are considering and look at what you actually have.

Is it:

heavy clay?
sandy?
chalky?
stony?
rich loam?
permanently damp?
baked almost solid in summer?

Then consider what happens after several days of heavy winter rain.

If water remains around the roots, simply planting lavender and rosemary into it is unlikely to create Provence.

On heavy soil

Rather than replacing an entire garden's soil, consider creating individual areas where drainage is improved.

These might include:

raised beds;
gently mounded borders;
gravel gardens;
planting beside walls;
raised herb beds;
large containers;
slopes that naturally shed excess water.

This also gives the garden height and structure.

A flat lawn surrounded by flat borders can suddenly become far more interesting when plants sit at several different levels.

Don't make it too rich

Many Mediterranean-style plants naturally grow in relatively poor soils.

Lavender, for example, doesn't need masses of nitrogen-rich fertiliser. Excessively fertile conditions can produce soft, floppy growth rather than the compact aromatic plants we actually want.

Sometimes gardening successfully means resisting the temptation to "improve" everything.

Gravel Can Be More Than Decoration

Gravel is one of the easiest ways to change the character of a garden.

Instead of a traditional arrangement of:

lawn → flower bed → fence

imagine:

gravel path → lavender → ornamental grasses → thyme → stone → salvia → seating area

Suddenly the garden begins to feel warmer and more relaxed.

But gravel is functional as well as decorative.

The RHS recommends gravel gardens for Mediterranean-style drought-tolerant planting and suggests plants including lavender, Verbena, Santolina and Phlomis. It also recommends a gravel mulch around 5-7.5cm deep for this type of planting.

Gravel can:

reduce exposed soil;
suppress weeds;
help reduce moisture loss;
provide a dry surface around plant crowns;
create paths without large areas of concrete;
visually connect separate planting areas.

And unlike an expanse of paving, planted gravel can still feel very much like a garden.

But don't just cover the garden in stones

There is a difference between a gravel garden and simply replacing vegetation with tonnes of decorative stone.

A good gravel garden is alive.

Plants emerge through it. Bees move from flower to flower. Grasses sway in the wind. Thyme creeps between stones. Seedheads remain through autumn.

The gravel is the stage.

The plants are still the performance.

Lavender: Almost the Perfect Starting Plant

If there is one plant that instantly says "Mediterranean", it is probably lavender.

It has a lot going for it:

attractive grey-green foliage;
wonderful scent;
flowers for pollinating insects;
tolerance of dry summer conditions;
relatively modest maintenance;
the ability to look good planted repeatedly.

But choose carefully.

English lavender, Lavandula angustifolia, is considerably more useful for many British gardens than simply selecting whichever exotic-looking lavender happens to be flowering at the garden centre.

RHS guidance rates English lavender as hardy across most of Britain, even through severe winters, provided it has good drainage; waterlogging remains one of its major enemies.

Try repetition

One lavender plant looks nice.

Seven lavender plants forming a loose ribbon beside a path look like garden design.

This is another lesson we can borrow from Mediterranean gardens: don't necessarily buy one of everything.

Repeat successful plants.

If something thrives in your garden, use more of it.

Rosemary: A Shrub, Herb and Garden Feature

Rosemary is another favourite because it earns its space.

It is:

evergreen;
aromatic;
useful in cooking;
attractive when flowering;
relatively drought tolerant once established.

Put one beside a path or patio where brushing against the foliage releases the scent.

A tall upright rosemary can become a small structural shrub. A spreading variety can tumble over a wall or raised bed.

Most importantly, once established, you are not trying to maintain a thirsty bedding plant purely for a few weeks of colour.

RHS guidance describes rosemary as hardy throughout most of the UK, although plants in colder locations can need winter protection.

Thyme: Let It Creep Between the Stones

Thyme deserves to escape from the herb garden.

Low-growing varieties are excellent around:

stepping stones;
gravel paths;
rockeries;
raised beds;
sunny edges.

Some produce carpets of tiny flowers which can be extremely attractive to insects.

They also create that slightly informal Mediterranean appearance where plants spill into paths instead of stopping precisely at the edge of the border.

Again, drainage matters. The RHS specifically advises growing thyme in raised beds or containers where soil is heavy or remains damp through winter.

Sage: Much More Than Something for Stuffing

Culinary sage is another plant we tend to think of as belonging in the herb bed.

It doesn't have to.

Its grey-green foliage works beautifully alongside:

lavender;
grasses;
dark-leaved plants;
stone;
terracotta;
gravel.

Purple and variegated forms can add more colour.

One warning applies yet again: avoid badly drained positions.

If your garden becomes a swamp every February, sage probably doesn't want to live at its lowest point.

Look Beyond the Obvious Herbs

This is where a Mediterranean-style garden becomes much more interesting.

You don't have to restrict yourself to lavender, rosemary and thyme.

Consider plants such as:

Phlomis

Architectural leaves and distinctive tiers of flowers give it enormous character.

RHS guidance notes that Phlomis generally performs well in Britain when planted in full sun and well-drained soil.

Santolina

Compact mounds of silvery aromatic foliage work beautifully beside lavender and gravel.

Cistus

Rock roses provide tissue-paper-like flowers and an unmistakably southern-European appearance. Hardiness varies, so position and variety matter.

Euphorbia characias

Its strong structure and unusual flowers can make a border look interesting long before summer reaches its peak.

Hylotelephium

Often still known to gardeners as sedum, its fleshy leaves help it tolerate dry conditions, while late flowers provide another useful source of garden interest. RHS drought-tolerant planting guidance includes Hylotelephium among plants suited to dry conditions.

Nepeta

Catmint creates generous mounds of foliage and flowers without demanding the same watering regime as many traditional bedding plants.

Achillea

Flat flowerheads provide a very different shape within the border and combine particularly well with grasses.

Verbena bonariensis

Tall, airy stems allow you to see through the planting rather than creating a solid wall of foliage.

The lesson is that we can create the character of a Mediterranean garden without filling it exclusively with plants originating around the Mediterranean.

Ornamental Grasses: Movement Without Thirst

Grasses are particularly useful because Mediterranean-style gardens can otherwise become a collection of static grey-green mounds.

Grasses provide:

movement;
height;
sound;
winter structure;
contrast against broad-leaved plants;
golden colour as summer progresses.

A blue-grey Festuca, for example, can look superb beside lavender and gravel, although RHS advice notes that Festuca prefers full sun and free-draining soil and can be short-lived in heavy damp conditions.

Larger grasses can provide punctuation marks through the border.

And unlike bedding displays that are ripped out at the end of the season, grasses often become more impressive as the year progresses.

Reduce the Lawn—Don't Necessarily Eliminate It

I am not convinced that every lawn has to disappear.

A patch of grass remains useful.

Children can play on it. It provides an open visual space. Birds feed on it. It gives us somewhere to sit.

But does every square metre need to be grass?

A lawn can become one of the thirstiest and most labour-intensive elements of a garden if our expectation is that it must remain emerald green throughout a prolonged dry summer.

Perhaps the answer is to reduce it.

Take a metre off one edge and make the border deeper.

Create a gravel seating area.

Add a herb bed.

Extend an existing border.

Turn an awkward sunny corner into a dry garden.

Make a little change each year

You do not have to redesign the whole garden in a weekend.

Imagine reducing a 100 square metre lawn by just 10 square metres.

That area could become a mixture of:

lavender;
salvia;
grasses;
thyme;
alliums;
gravel;
perhaps one attractive structural shrub.

Do another section a year later if the first one succeeds.

Garden adaptation can be evolutionary rather than revolutionary.

Stop Treating Brown Grass as a Disaster

This may be one of the hardest changes psychologically.

We have been trained to think:

green grass = healthy garden

and

brown grass = failing garden.

But many established British lawns naturally become dormant during drought and recover when rainfall returns.

Perhaps we need to become slightly more tolerant of seasonal change.

A summer lawn does not necessarily need to look like a Premier League football pitch.

If we accept that some areas will turn golden while surrounding drought-resistant borders continue flowering, the entire garden can still look deliberate.

There is an enormous difference between:

"My garden has gone brown."

and:

"My garden has entered its dry-season phase."

The plants around it can make that difference.

Use Mulch—but Match the Mulch to the Plant

Mulching is one of the simplest ways of reducing evaporation from the soil.

Organic materials such as compost and bark can be useful around many conventional garden plants.

But around plants that dislike moisture sitting around their crowns, gravel can be particularly appropriate.

A gravel mulch can also bring the whole visual design together.

Imagine silver foliage, purple lavender, pale grasses and warm-coloured gravel.

Suddenly water conservation stops looking like an environmental compromise and starts looking like good garden design.

Water Differently, Not Just Less

A drought-tolerant garden is not a garden that never needs watering.

New plants need to establish.

Their roots initially occupy roughly the volume of compost that was inside the pot in which you bought them.

If you simply plant them and assume "lavender likes drought", they may die.

The goal during the first season is to encourage the root system to spread deeper and further into the surrounding soil.

The RHS recommends deep, occasional watering rather than frequent light watering, as this encourages stronger, deeper root systems.

That might mean thoroughly soaking a newly planted border and then allowing the surface to dry rather than giving it a superficial sprinkle every evening.

Drip irrigation can make sense

Where irrigation really is necessary, put the water where the plants need it.

Drip lines and seep hoses can deliver water around the root zone and can be hidden beneath mulch. The RHS identifies both as potentially efficient methods when used carefully.

Compare that with a sprinkler throwing drinking-quality water through warm air, onto paths, leaves and fences.

One method is irrigation.

The other can sometimes resemble garden-scale rainmaking.

Don't Forget the Water Butt—But Recognise Its Limits

Collecting rainwater remains extremely worthwhile.

But there is a basic problem.

We tend to receive plenty of rain when the garden doesn't need much water and very little when demand reaches its maximum.

I have already seen how quickly a large water butt can be emptied when essential plants need watering through a sustained hot spell.

That reinforces the importance of reducing demand rather than concentrating entirely on increasing storage.

Suppose you double the amount of water you store.

Useful.

But suppose you halve the amount of water the garden needs.

Potentially much more powerful.

The ultimate water-saving device may therefore not be a bigger tank.

It may be a lavender plant.

Containers Need Special Treatment

Mediterranean-style planting is perfect for pots, but there is a catch.

Containers dry much faster than garden soil.

Terracotta looks wonderful but is porous and can dry particularly quickly in hot weather. RHS guidance also notes that larger and deeper containers retain moisture for longer than small shallow ones.

So instead of dozens of tiny pots, consider fewer, larger ones.

Use them for plants where winter conditions are marginal.

A large pot containing a tender or borderline-hardy plant can be:

moved beside the house;
placed in a rain shadow;
moved into a greenhouse;
insulated;
protected during severe weather.

Containers therefore allow us to experiment without redesigning the entire garden.

The Forgotten Mediterranean Ingredient: Shade

When we imagine Mediterranean gardens, we tend to imagine sunshine.

But people living in hot climates spend an awful lot of effort creating shade.

That lesson may become increasingly valuable in Britain.

A garden designed for hotter summers might include:

a pergola;
a small tree;
climbing plants;
a parasol;
a sail shade;
covered seating;
strategically positioned taller planting.

Shade benefits people, but it can also reduce water loss from vulnerable plants and make a patio usable when direct afternoon sunshine becomes uncomfortable.

A climate-adapted garden shouldn't merely survive the heat.

We should be able to enjoy it during the heat as well.

Mediterranean Style Doesn't Mean Sterile

One concern about dry gardens is that they could become gravel deserts.

That would be a mistake.

Lavender, thyme, Verbena, Phlomis and many other drought-tolerant flowering plants can provide valuable nectar and pollen. The RHS specifically highlights the wildlife potential of well-planted gravel gardens.

So retain:

flowers;
seedheads;
varied plant heights;
small patches of bare ground;
stones;
shrubs;
water where possible;
shelter.

We can save water and increase the biological interest of the garden.

Those two objectives are not contradictory.

A Simple Mediterranean-Style Border You Could Create This Weekend

Imagine a sunny border roughly 3m x 2m.

Remove struggling or excessively thirsty plants and improve the drainage where necessary.

Then try something like:

Back of border

2 ornamental grasses
1 upright rosemary
2 Verbena bonariensis

Middle

3 lavender plants
3 Nepeta
2 Phlomis or Euphorbia

Front

thyme
low-growing herbs
small Festuca grasses

Between plants

gravel mulch

Through the border

several large stones or simple stepping slabs

Optional

one terracotta pot containing a more tender specimen that can be protected during winter.

Don't arrange everything like soldiers.

Use small repeated groups and allow plants to overlap.

Within a couple of seasons it could look far more natural than the traditional border of individual specimens.

Seven Things You Can Do Without Redesigning the Whole Garden

If a complete Mediterranean-style garden sounds too ambitious, start small.

Replace one thirsty plant with a drought-tolerant alternative.
Plant a group of English lavender somewhere sunny and well drained.
Turn one lawn edge into a deeper border.
Add a gravel mulch to an appropriate dry border.
Install a short drip or seep hose rather than repeatedly using a sprinkler.
Create one raised herb bed for rosemary, thyme, oregano and sage.
Identify the hottest, driest part of your garden and stop trying to grow moisture-loving plants there.

The seventh may be the most important.

We often spend enormous amounts of effort trying to force plants to grow somewhere they fundamentally dislike.

What I Would Avoid

There are several traps.

Buying plants purely because they look Mediterranean

That beautiful specimen may be perfectly happy in southern Spain and thoroughly miserable during a British February.

Check hardiness first.

Ignoring your local microclimate

A sheltered London courtyard and an exposed garden in northern England are very different environments.

Even within one garden there may be large differences.

A south-facing brick wall can create a remarkably warm microclimate.

Assuming drought tolerant means no watering

New plants need time to establish.

Creating a sea of gravel with three plants in it

That isn't really a drought-tolerant garden.

It is mostly a car park.

Removing every piece of lawn

Keep some if it has a useful purpose.

Forgetting winter

The plant that survives August may be killed by February.

Design for twelve months, not twelve weeks.

A Different Kind of British Garden

I suspect many British gardens will gradually change over the coming decades.

Not because somebody orders us to change them.

Because gardeners are practical.

If a plant repeatedly needs watering, repeatedly suffers in the heat and repeatedly disappoints, eventually we replace it with something better suited to the conditions.

The same applies to huge areas of thirsty lawn.

And that does not have to mean losing the character of our gardens.

Quite the opposite.

A Mediterranean-style garden can be packed with:

scent;
flowers;
insects;
movement;
herbs;
texture;
colour;
interesting places to sit.

It can potentially require less watering and less mowing while giving us more time simply to enjoy being outside.

Most importantly, it represents a change in philosophy.

For generations we designed British gardens around the expectation of relatively dependable rainfall.

Increasingly, perhaps we should design them to cope gracefully when the rain doesn't arrive.

And at the same time, we must remember that winter could still bring weeks of cold, saturated soil.

That is why the future British garden may not actually be Mediterranean.

It may be something more interesting:

a genuinely British climate-resilient garden, borrowing the best ideas from warmer parts of the world while remaining adapted to the climate we actually have.

So when the lawn turns brown next summer, perhaps the first question should no longer be:

"Where's the hosepipe?"

Perhaps it should be:

"What could I plant here instead?"

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