Drought-Tolerant Planting and Design: How to Create a Garden That Thrives in Dry Summers

6 days ago

4 min read

After my summer blog on conserving water, I wanted to look closer at one of the most important ways to prepare for dry seasons: choosing the right plants and designing around them.

If your garden suffered through one of the hottest summers we've ever had, now is a great time to make changes. Plants put in during autumn have longer to build a strong root system before their energy goes into fresh growth, and a bigger root system means a better ability to reach deeper water reserves in the soil. (Spring planting is still worth doing, and everything below applies then too.)

Understanding plant life cycles

Knowing how long a plant lives makes a big difference to how well it copes with harsh conditions. Here's a quick guide, from least to most drought-resilient.

· Tender annuals live for one year and are sown in spring. They're the divas of the garden: they sulk in the cold, wilt in extreme heat, and have the least time to grow deep roots. Examples: cosmos and zinnias.

· Hardy annuals are sown in early to mid autumn and flower the following year, giving them stronger roots before summer heat. Examples: calendula and cornflowers.

· Biennials take two years, building roots and foliage in the first and flowering in the second. Like hardy annuals, they're best sown in autumn. Examples: foxgloves and honesty.

· Perennials return year after year and have the longest time to establish, making them the strongest against extreme heat. Hardy perennials can be left in place and divided when they outgrow their space. Examples: Echinacea and sedum. Tender perennials, such as Chrysanthemums, may need winter frost protection.

· Shrubs and trees are woody plants that live for many years. Deciduous ones lose their leaves each autumn, while evergreens keep theirs. Once established they're very resilient, but being larger, they need more water so keep an eye on them in extreme heat, especially if newly planted. Evergreen examples : rosemary and cistus. Deciduous examples: buddleja and smoke bush.

Within each category, plants favour different conditions: shade or full sun, moist or free-draining soil. Getting to know your space really pays off here.

Look to the Mediterranean for design inspiration

One of the best ways to plan for our changing climate is to look at places that already have it. Mediterranean-style gardens are popular for a reason: they're designed around hot, dry weather. Think olive trees, ornamental grasses and plenty of perennial herbs, with gravel paths winding between them.

That said, even within the UK, climates vary enormously, so match your choices to your local rainfall, soil and exposure.

Plants to consider

For full sun and free-draining soil

· Lavender and rosemary

· Sedum

· Verbena bonariensis

· Eryngium (sea holly)

· Stipa tenuissima and other ornamental grasses

· Nepeta (catmint)

For shade and dry shade

· Epimedium

· Hardy geraniums, especially Geranium macrorrhizum

· Euphorbia amygdaloides var. robbiae

· Bergenia

· Hellebores

· Ferns such as Dryopteris

Design tips that make a real difference

Group plants by water needs. Keeping thirstier plants together, and drought-tolerant plants together, makes watering far more efficient and prevents over- or under-watering.

Rethink your layout. Reducing lawn in favour of gravel gardens, ground cover or drought-tolerant borders can significantly cut your garden's water demand.

Mulch and prepare the soil. A thick layer of mulch locks in moisture, and improving soil structure helps it hold water without becoming waterlogged.

Rethink your pots. Containers dry out far faster than soil in the ground, so the fewer you have, the less watering you'll do. If you love them, go bigger: a large pot holds more moisture and stays cooler than lots of small ones.

Hard landscaping: surfaces and structures

The parts of your garden that aren't plants matter just as much in a drought, and at least they never need watering.

· Gravel gardens. Spread a 5cm layer of gravel directly over the soil as a mulch, planting straight into the ground with no weed membrane, which blocks air and water and clogs up over time. The gravel reduces evaporation, suppresses weeds and suits Mediterranean planting, and self-seeders can spread naturally between plants.

· Permeable paving. Solid paving sends rainwater into the drains. Gravel, or slabs and bricks laid with gaps filled with sand or gravel, lets rain soak in so more of it reaches your plants.

· Light-coloured stone. Pale paving and walls reflect heat, while dark surfaces absorb it and bake nearby plants.

· Shade structures. Pergolas, trellis with climbers and even a well-placed tree cool the soil and cut water loss beneath them.

Final thoughts

Preparing for drier summers doesn't mean giving up a beautiful garden. By choosing plants with longer life cycles, matching them to the right spot, grouping them by water needs and rethinking how much space we give to thirsty lawns, we can build gardens that are resilient, lower-maintenance and full of colour. Autumn is the perfect time to start, so give your plants a head start while the weather is kind. Next summer, you can sit back with a cold drink while the hosepipe stays happily in the shed.