Start with the Soil and the Shape of the Border

Cottage planting looks effortless, but it sits on good preparation. These borders are planted densely, and dense planting strips nutrients quickly. Before anything goes in, spread two buckets of well-rotted manure or garden compost over each square metre and fork it into the top 20cm. On heavy clay, add grit at the same time; on sandy soil, expect to top up the organic matter every autumn.

Aim for a border at least 1.2 metres deep so you can layer plants front to back: low cushions at the edge, mid-height perennials in the middle, tall spires behind. A sunny site suits the herbs and most flowering perennials; a shadier one can still work beautifully if you give over part of it to ferns and woodland plants rather than fighting the conditions.

Spring: Bulbs, Wallflowers and Early Perennials

Spring colour begins underground the previous autumn. Plant daffodils and tulips in September and October in informal drifts rather than single lines, setting each bulb about three times its own depth. Underplant them with forget-me-nots and wallflowers, which flower as the bulbs fade and knit the border together.

Among the perennials, look to pulmonaria, epimedium, hellebores and hardy geraniums such as Geranium phaeum and G. macrorrhizum — quiet workhorses that fill gaps and suppress weeds. Space them 30–40cm apart and let them close up by midsummer. Honesty and aquilegia self-seed freely; leave a few seedheads and thin the seedlings in March, while they are still small and the soil is workable.

Early Summer: The Fragrant Herb Layer

Herbs belong in the border as much as in the kitchen. They give scent, flower and foliage structure, and the bees adore them.

• Lavender: full sun and sharp drainage — plant on a slight mound with grit in the planting hole.
• Rosemary: needs a sheltered, sunny spot; upright forms make a neat vertical accent.
• Thyme and oregano: ideal at the front edge, spilling over a path.
• Chives: neat edging, edible flowers, and fresh leaves after a cut-back.
• Mint: always in a pot sunk into the soil, or it will run.

Borage, calendula and nasturtium self-seed into gaps. Cut borage back after its first flush for a second wave, and scatter the flowers over salads.

High Summer: Perennials That Carry the Border

By July the border should be at its fullest. Reliable choices include catmint (Nepeta), which needs a hard cut after the first flush to earn a second, plus achillea, Salvia nemorosa, echinacea, rudbeckia and phlox.

For height, hollyhocks, delphiniums and verbascums supply the verticals a cottage border needs. Stake in May with hazel pea sticks or twiggy branches pushed in before the plants need them, so the foliage grows up through the support and hides it. Deadhead weekly to keep flowers coming, but leave a few stems to ripen seed for the birds and for next year's seedlings.

Ferns for Shade, Texture and Stillness

Ferns are the counterpoint to all that flower. They want moist, humus-rich soil, shelter from drying wind and, for most, dappled shade.

• Dryopteris filix-mas: the native male fern, tough and tolerant.
• Polystichum setiferum: soft shield fern, evergreen and architectural.
• Asplenium scolopendrium: hart's tongue, glossy straps that cope with lime.
• Athyrium niponicum var. pictum: silver and burgundy fronds for a shady corner.

Mulch with leafmould or compost each spring, keeping it clear of the crown. Water well through the first summer and in dry spells, and cut back old fronds in late winter before the new croziers unfurl in March. Keep them out of the hottest, driest part of a south-facing border.

Autumn, Winter and the Yearly Rhythm

Autumn brings asters, sedums and Japanese anemones, along with grasses such as Deschampsia cespitosa. Leave seedheads — teasel, eryngium, honesty and verbena — standing through winter for structure and for the birds.

A cottage border is not low maintenance, but the work is small and regular: mulch in autumn, cut back in late winter, thin self-seeders in spring, deadhead in summer. The Chelsea chop in late May, cutting some perennials back by a third, staggers flowering and keeps plants compact. Let it be a little unruly — that looseness, rather than perfect spacing, is what makes a border feel like a cottage garden.