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Why Drought-Tolerant Plants Make Sense in a Changing Climate

British summers are becoming warmer and drier, and many of us are looking for borders that look after themselves. A drought-tolerant garden is not about gravel and cacti alone; it is about choosing plants that settle in, then shrug off weeks without rain. Once established, lavender, sedum and rosemary need little more than an occasional tidy-up. That means more time sitting with a cup of tea and less time trailing a hose. These plants also suit heavy clay soils that bake hard in summer, as long as you improve drainage at planting time. For a slow-living garden, they offer scent, movement and nectar for pollinators without demanding constant attention.

Lavender: Scent, Colour and Bees

English lavender (Lavandula angustifolia) is the hardiest choice for most UK gardens. Look for 'Hidcote' for deep purple flowers or 'Munstead' for a compact, early-flowering habit. Both reach around 45–60cm and form neat, silvery mounds. Plant them in full sun, in soil that drains freely. If your garden is clay, add grit and plant on a slight mound. Lavender hates wet feet in winter, so avoid low spots. Water well in the first summer, then leave it to fend for itself. Prune lightly after flowering, taking care not to cut into old, leafless wood. A gravel mulch around the base keeps foliage dry and suppresses weeds. The reward is a haze of blue-purple flowers from June to August, alive with bees, and stems you can dry for winter posies.

Sedum: Late-Season Nectar for Pollinators

Sedum spectabile, now correctly called Hylotelephium, is a stalwart of the dry border. 'Herbstfreude' (often sold as Autumn Joy) and 'Matrona' are reliable, forming clumps of fleshy, grey-green leaves. In late summer, flat heads of tiny pink or white flowers open and last well into autumn. Bees and butterflies flock to them when little else is in bloom. Sedums tolerate drought once established, and they prefer poor to moderately fertile soil. Rich, damp conditions make them floppy. Leave the faded flowerheads standing through winter; they look lovely frosted and provide shelter for insects. Cut them back in early spring, and divide clumps every three or four years to keep them vigorous.

Rosemary: Evergreen Structure and Flavour

Rosemary (Salvia rosmarinus) gives you an evergreen shrub, early flowers and a kitchen herb in one. 'Miss Jessopp's Upright' makes a dense, upright plant that can be clipped into a low hedge or used as a backdrop. Prostrate forms, such as 'Prostratus', spill beautifully over walls and steps. Rosemary needs sharp drainage and a sunny, sheltered spot. It is hardy in most of the UK, but cold, wet winters can kill it, especially on heavy soil. Plant it with plenty of grit, and water only until it settles. Harvest sprigs regularly to keep it bushy. Pale blue flowers appear from spring onwards, earlier than lavender, and the aromatic foliage releases its scent as you brush past.

Other Hardy Plants for a Dry Border

Once you have the core trio, weave in companions that share the same needs. Plant in groups of three or five for a natural, generous look.

• Thyme (Thymus vulgaris) — low-growing, aromatic, perfect between paving stones or edging a path.
• Santolina — silvery, feathery foliage and yellow button flowers; clip after flowering to keep it tidy.
• Cistus (rock rose) — short-lived but floriferous, with papery white or pink flowers in early summer.
• Euphorbia characias — architectural grey-green stems and lime-green bracts; wear gloves, as the sap can irritate skin.
• Ornamental grasses — Stipa tenuissima and Pennisetum add movement and soften the border; cut back in early spring.

All of these enjoy the same free-draining conditions and, once settled, need very little watering.

Planting and Aftercare for a Low-Maintenance Garden

The secret to a drought-tolerant border is in the planting. Improve heavy soil by digging in grit and well-rotted compost, then plant on a slight mound so water never pools around the crown. Spring and early autumn are the best times to plant, giving roots time to establish before extremes of weather. Water deeply once a week for the first summer — a good soak is better than a daily sprinkle — then taper off. A 5cm layer of gravel or bark mulch will lock in moisture and keep weeds down. Avoid rich fertilisers; too much food encourages soft growth that flops and needs staking.

After the first year, your garden will need only seasonal attention: a light prune for lavender and rosemary, a tidy-up of sedum in spring, and a quick weed. That is the slow-living reward. You can spend your weekends watching the bees, cutting herbs for supper, or simply sitting in the evening scent of rosemary and lavender. A low-maintenance garden is not an unloved one; it is a garden that works with the weather, the soil and your own pace of life.