Why Small Spaces Need Careful Planting

A courtyard garden behind a mews house or a converted coach house is one of the most rewarding spaces in British gardening — and one of the least forgiving. Often the plot is little more than four walls, a paved floor and a narrow border, perhaps three metres by five. Every plant is seen from close quarters, from above and from the kitchen window, so anything that grows leggy, sulks in shade or bulks out beyond its welcome will be noticed immediately.

The temptation is to fill the gap with whatever is on offer at the garden centre in April. Resist it. In a courtyard, a shrub that reaches two metres in three years will be scraping the downpipe and blocking the light to everything behind it. What you want instead are slow-growing evergreens and genuinely dwarf varieties — plants that hold their shape for years, offer year-round structure, and ask for nothing more than a light tidy-up each spring.

Understanding Your Courtyard's Conditions

Before choosing anything, spend a week watching the space. Most mews courtyards fall into one of two camps: bright and baking, with sun trapped between brick walls from mid-morning until evening, or cool and shaded, often north-facing, with only a slice of light in high summer. Both are workable, but they call for different plant lists.

• Hot, sheltered courtyards hold warmth well into autumn, which suits Mediterranean evergreens and silver-leaved shrubs, but the soil dries out fast. Mulch generously and water deeply rather than little and often.
• Shady courtyards stay damp and still. Choose plants that tolerate root competition and low light, and avoid anything labelled "full sun" no matter how tempting the foliage.
• Containers versus borders make a real difference. In a pot, a shrub's roots are confined, which naturally restricts growth — a useful trick — but it also means you must feed and water diligently.

Wind is another consideration. A narrow passage between buildings can funnel gusts that shred soft growth and dry out evergreens in winter. If your courtyard is a wind tunnel, favour tough, leathery leaves over feathery foliage.

Evergreens That Earn Their Space

Structure is everything in a small garden, and evergreens provide it in January as readily as in July. The key is to pick species with a naturally tight habit rather than ones you must constantly hack back.

Dwarf box and its blight-resistant relatives remain the classic choice for low hedging and clipped balls, though box has become a gamble in many parts of the country. Japanese holly cultivars make an excellent substitute, with small glossy leaves and a dense, rounded frame. Skimmia is ideal for shade, offering red buds through winter and scented flowers in spring, and it rarely exceeds a metre. Dwarf rhododendrons and pieris suit acid soil in a shaded corner.

For something with a little more character, consider Pittosporum tenuifolium in its compact forms, whose wavy-edged leaves catch the light, or Euonymus fortunei varieties such as 'Emerald Gaiety', which will happily clip into a low informal hedge. All of these can be kept to roughly 60–90cm with minimal effort.

Dwarf Deciduous Shrubs for Seasonal Interest

Evergreens alone can feel static. A few compact deciduous shrubs add flowers, autumn colour and a sense of the seasons turning without taking over.

• Dwarf Japanese maple — slow, graceful and perfect in a large pot, though it needs shelter from drying wind.
• Hydrangea 'Little Lime' or similar compact paniculates — long-flowering and happy in a big container with shade at the roots.
• Daphne mezereum — small, upright and intensely fragrant in late winter, though it dislikes being moved.
• Cotoneaster horizontalis — excellent trained against a wall, with berries for the birds.

Choose two or three of these at most. In a courtyard, restraint reads as good design; a jumble of twelve shrubs reads as clutter.

Planting and Spacing in Tight Quarters

Give plants more room than you think they need. A shrub bought in a two-litre pot may look lost in a metre-wide border, but within three years it will have doubled. As a rough guide, leave at least 60cm between small shrubs and 90cm between medium ones, then fill the gaps for the first season with annuals or short-lived perennials that you can remove later.

Improve the soil before planting rather than after. Courtyard borders are often rubble and builder's sand beneath a thin skim of topsoil, so dig out a generous planting hole, break up the base with a fork for drainage, and mix in well-rotted garden compost. In containers, use a soil-based compost such as John Innes No. 3, which holds moisture and anchors roots far better than peat-free multipurpose alone. Raise pots onto feet so water drains freely, and never let them sit in a saucer through winter.

The Spring Tidy-Up

Once established, most compact shrubs need only one piece of attention a year: a light prune in spring, just as growth begins. Wait until the worst of the frosts have passed — mid to late March in most of the UK, later in the north.

Take out dead, damaged and crossing stems first, then shorten the previous year's growth by roughly a quarter to a third. Resist the urge to cut hard. Light, regular pruning keeps a plant dense and in scale; hard pruning forces soft, rank regrowth that spoils the shape and often sacrifices the season's flowers. Clip evergreens with shears or secateurs to a slightly domed outline so rain runs off and snow does not sit heavily on flat tops.

Feed containers in April with a slow-release fertiliser, top-dress the surface with fresh compost, and spread a mulch of bark or leafmould over borders to lock in moisture. After that, a courtyard garden largely looks after itself — and rewards you every time you step outside the back door.