Start with the Bones

A cottage border that only performs in July is a border that disappoints for three-quarters of the year, and in a small plot you cannot afford that. The answer is to build the border in layers: clipped evergreens for structure, bulbs pushing up through them, perennials to fill the middle ground, and seedheads and scent to carry the whole thing into winter. Get the bones right and everything else has somewhere to sit.

Begin with the soil. Cottage plants are greedy, and a border against a period wall is often dry at the roots, shaded for part of the day and full of old rubble. Fork in two or three barrows of well-rotted manure or garden compost per square metre, plus a handful of blood, fish and bone, and let it settle for a fortnight before planting. On heavy clay, work in grit; on thin sandy soil, add leafmould. A bed just a metre deep and four metres long will hold far more than you expect if you plant in layers rather than a single row.

Clipped Evergreens for the Skeleton

Structure is what separates a charming border from a shapeless one. Even in the smallest plot, three or four clipped shapes will hold the design together through every month of the year.

• Box (Buxus sempervirens) remains the classic choice, but with box blight and moth about, many gardeners now use Japanese holly (Ilex crenata) or yew (Taxus baccata) for the same effect. Yew clips beautifully and tolerates shade.
• Lavender (Lavandula angustifolia 'Hidcote') suits a sunny front edge, clipped lightly after flowering — never cut back into old, leafless wood.
• Sarcococca confusa earns its place in shade, offering glossy evergreen leaves and vanilla-scented flowers in the dead of winter.
• Rosemary or a low dome of Hebe rakaiensis will give you another quiet green anchor.

Space them 70–90cm apart so the rhythm reads clearly, and clip box and yew twice a year — late May and again in late August — avoiding the hottest part of a bright day.

Spring: Bulbs Threaded Through Everything

Plant bulbs in September and October, in generous drifts rather than neat lines, and plant them in layers. The old cottage trick is the bulb lasagne: tulips deepest at around 20cm, daffodils at 15cm, then crocus and grape hyacinth at 8cm, with snowdrops barely below the surface. One planting gives you six weeks of colour from the same square foot.

Choose daffodils that naturalise well, such as 'Thalia' or 'February Gold', and tulips you are happy to treat as annuals — 'Queen of Night' and 'Ballerina' are both lovely against brick. Underplant with wallflowers for scent, forget-me-nots for froth, and pulmonaria for early bees. Snowdrops are best moved 'in the green' in February or March, while hellebores will flower from January and hold their leaves all year.

Summer: Succession and Repetition

Summer is the easy part, but the temptation is to buy one of everything. Resist it. In a small border, repeating two or three key plants reads far better than a jumble.

• Roses — a repeat-flowering shrub rose such as 'Gertrude Jekyll' or 'Desdemona' gives scent, cut flowers and hips.
• Hardy geraniums — 'Rozanne' flowers for months and weaves through everything.
• Nepeta and alchemilla — soft, hazy edges that soften hard paving.
• Salvia 'Caradonna' and verbena — tall, airy spires that add movement without bulk.

Stake early with hazel peasticks in May, before plants flop, and deadhead weekly to keep flowers coming. Keep to a restrained palette — soft pinks, blues and creams with one hotter accent — so the border feels considered rather than collected.

Autumn and Winter: Seedheads, Scent and Quiet Structure

When the roses finish, other plants take over if you have planned for them. Sedums, heleniums, asters and Japanese anemones carry September and October, while ornamental grasses such as Stipa tenuissima and Miscanthus add a shimmer that lasts well past the first frost.

Then do the hardest thing in gardening: leave things alone. Stands of echinacea, phlomis, alliums and teasel look magnificent rimed with frost and feed the birds. Cut them back in early March, not November. Add sarcococca, winter jasmine, mahonia and Cyclamen coum for scent and colour at the darkest point of the year, and let your clipped evergreens do the rest of the work.

Keeping It Going, Year After Year

Mulch the border with compost each spring, before the perennials are tall enough to hide the work. Lift and divide crowded clumps of geraniums, asters and heleniums every third year, replanting the strongest outer pieces. Top up bulbs each autumn rather than lifting them, and trim your evergreens on schedule. A border built in layers like this needs perhaps a day of attention in spring, an hour a week in summer, and almost nothing in winter — which is exactly the sort of garden a period house deserves.