Why a wildflower border earns its place

A strip of native wildflowers along a fence line, a garden path or the sunny edge of a lawn does more than look lovely. It feeds bees, hoverflies and butterflies from spring through to the first frosts, gives seed-eating birds something to raid in winter, and asks remarkably little of you once it is established. Best of all, it changes week by week: cowslips in April, ox-eye daisies in June, knapweed and scabious in high summer, then tawny seed heads standing pale against a January sky.

You do not need a meadow. A border two metres wide and six to ten metres long, in full sun for at least six hours a day, is generous enough to make a real difference and easy enough to manage with a strimmer and a rake. Think of it as a border that behaves like a meadow, rather than the other way round.

Start with the soil, not the seed

The single most common reason wildflower plantings disappoint is soil that is too rich. Fertile ground grows rank grass, docks and nettles, and your delicate flowers are smothered before they have a chance. So resist every instinct to dig in compost or manure. If your soil is deep, dark and full of worms, consider stripping the top five to ten centimetres and stacking it for use on the vegetable plot.

Before sowing, clear the ground properly:

• Remove all perennial weeds by hand, getting every scrap of couch grass, dock, thistle and bindweed root out. This takes weeks, not hours, and is worth every minute.
• Cover cleared ground with black polythene or a thick layer of cardboard for a season to weaken anything you missed.
• Choose your spot carefully. Most native wildflowers want open sun and reasonably free drainage; a boggy, shaded corner will never suit them.
• Do not add fertiliser, and do not treat the area with weedkiller once seed is in the ground.

Choose native seed, and choose carefully

Look for British native provenance on the packet, and read the species list rather than the picture on the front. Good mixes include ox-eye daisy, field scabious, greater knapweed, meadow cranesbill, yarrow, betony, selfheal, cowslip and salad burnet, alongside a few fine grasses.

• Annuals for instant colour: corn poppy, cornflower and corn marigold will flower in their first summer, then fade as the perennials take hold. Useful, but not the main event.
• Yellow rattle is the meadow-maker's best friend. This native annual is partly parasitic on grass roots, weakening grasses so flowers can compete. Sow it in autumn, as it needs cold to germinate.
• Fine grasses such as crested dog's-tail, sweet vernal grass and smaller cat's-tail hold stems upright, fill gaps and give lovely winter structure.
• Include a few plug plants of slower species for gaps, planted out in September or October.

Sowing and the first season

September to October is the best sowing window, with March to April a workable second choice. As a guide, sow a pure wildflower mix at about two grams per square metre, or a grass-and-flower mix at four to five grams. Mix the seed with silver sand so you can see where it lands: broadcast half walking one way, half walking across, then rake lightly and firm the surface with a board or your boots. Most of these seeds need light, so barely cover them.

In the first year, your job is to keep weeds down and roots going down. Cut the whole area to about five centimetres whenever growth reaches ten to fifteen centimetres, roughly every six to eight weeks, and always rake off the clippings. It will look severe. It is exactly right.

Managing the border through the seasons

Once established, a simple annual rhythm keeps the border healthy and full of colour:

• Spring: leave last year's stems standing until March, then cut to five centimetres and rake off the debris. Spring bulbs push through the stubble.
• Summer: resist the mower. Let the ox-eye daisies and knapweed flower from June onwards, and leave seed heads to ripen rather than deadheading everything.
• Late summer: make the main cut between late July and mid-August, once seed has set. Leave a different third uncut each year so seed drops and birds have something to feed on.
• Autumn: take a second cut in October after a few weeks of regrowth, remove the arisings, and sow yellow rattle into any thin patches.
• Winter: stand back and enjoy it. Tall stems shelter overwintering insects and look superb rimed with frost.

Keeping colour going all year

Colour comes from layering. Naturalise spring bulbs beneath the flowers: native daffodils, crocus, snake's head fritillary and camassia, planted in autumn where the summer growth is thinnest. Then let the perennials take over in succession, with ox-eye daisy leading in June, meadow cranesbill and knapweed in July, field scabious and betony in August, and devil's-bit scabious carrying on into September. Through winter, the seed heads of teasel, greater knapweed and the fine grasses do the work, perhaps with a clipped evergreen or two at the back of the border for structure.

Be patient. A wildflower border usually looks modest in its first summer, encouraging in its second and genuinely beautiful by its third. Once it reaches that point, the maintenance is two cuts a year and a rake. Feed it nothing, spray it never, and it will reward you for a decade.