As heatwaves and prolonged dry spells become an increasingly common feature across the United Kingdom, gardeners are seeking plants that can withstand high temperatures and limited water availability. Experts advise focusing on species that not only tolerate heat but thrive in well-drained soils, as many drought-resistant plants are vulnerable to cold, wet conditions during winter.
Established shrubs with deep root systems are generally resilient, able to access moisture stored deeper underground despite above-ground signs of stress such as early leaf loss. For gardeners, replicating conditions found in sandy or rubble-thin topsoil areas, raised beds, or urban gardens with heat-retaining surfaces can aid in cultivating drought-tolerant varieties.
Successful plants often display specific adaptations to cope with sun and heat stress. These include small, needle-like leaves that limit water loss, silver or white foliage to reflect sunlight, and hairy or waxy leaves that reduce evaporation. Some species possess thick, leathery leaves or deep taproots to access water far below the surface, making them ideal for dry environments.
A selection of recommended plants includes Calamint ‘Blue Cloud’ (Calamintha nepeta), which features aromatic leaves and lavender-blue flowers and remains semi-evergreen in mild winters. White Gaura ‘The Bride’ (Oenothera lindheimeri) is a short-lived perennial with deep roots and continuous summer blooms. Siberian spurge (Euphorbia seguieriana subsp. niciciana) is noted for its acid-green flowers and drought endurance.
The Australian evergreen Grevillea ‘Canberra Gem’ produces needle-like leaves and distinctive red flowers, flourishing during hotter months. Perovskia ‘Little Spire’ (Salvia) offers violet-blue flower spikes and sage-green leaves requiring minimal upkeep. Sedum ‘Green Expectations’ (Hylotelephium) attracts pollinators with lime-green flowers and holds well through winter in poor, well-drained soil.
Other recommended species include Autumn Sage ‘Strawberries and Cream’ (Salvia greggii), prized for its bicolored flowers and suitability for container planting; Thyme ‘Jekka’ (Thymus), a low-growing herb with drought-resistant leaves; and Lamb’s Ear (Stachys byzantina), valued for its soft, silvery foliage and summer purple blooms, often utilized in gravel garden borders.
As climate change continues to impact growing conditions, gardeners are increasingly on the front lines of adapting landscapes to endure hotter, drier weather. Selecting plants adapted to these challenges is a key strategy for maintaining resilient and vibrant gardens in the face of evolving environmental stresses.