Plant Selection for South-Facing Chalky Clay Loam Gardens

Gardening in Devon: Sun, Soil, and Smart Choices

A south-facing garden in Devon with chalky subsoil and clay loam topsoil (pH 6.5) offers excellent growing conditions for a wide range of plants—provided drainage is adequate.

Plants to Embrace

Most ornamental plants thrive in near-neutral pH with good drainage. Focus on sun-loving perennials, shrubs, and trees that tolerate alkaline conditions. Mediterranean herbs, lavender, salvias, and many roses perform beautifully.

Plants to Approach with Caution

• Shade-lovers: Hostas, vinca, skimmias, and some camellias will struggle in full south sun.
• Acid-lovers: Rhododendrons, azaleas, and camellias prefer pH 4.5–5.5. They can be grown with regular ferrous sulfate applications to maintain iron availability.

Universal Best Practice

Regardless of plant choices, incorporate compost annually. It improves clay structure, buffers pH, enhances moisture retention, and feeds soil biology—the foundation of a resilient garden.

For tailored recommendations, share details on drainage, existing struggling plants, and your preferences (flowers, shrubs, trees, groundcovers).