Why One Season of Colour Isn't Enough

A patch that blooms for three glorious weeks in July and then sulks for the rest of the year looks lovely once, but it doesn't feed much. Solitary bees, bumblebee queens, hoverflies and butterflies need a continuous supply from the first warm days of March right through to the last asters in October. A queen bumblebee emerging from hibernation in early spring is desperate for pollen and nectar, and if your patch is still bare soil she'll go hungry. The trick is to think in waves rather than a single flush, then to leave the whole thing standing well into winter so the creatures that used it can overwinter in it.

The good news is that you don't need a meadow. A trio of pots, a strip beside the bin store or a metre of border will do far more than you might expect, provided you choose the right mix and treat it as a year-round habitat rather than a seasonal display.

Building a Mix That Runs from Spring to Autumn

Buy or blend a mix with roughly 70 to 80 per cent perennials and 20 to 30 per cent annuals. The annuals give you a fast, colourful first year while the perennials are still settling in; the perennials then carry the patch for years afterwards. Look for these on the seed list:

• Early (March to May): cowslip, primrose, lungwort, red dead-nettle, forget-me-not, ajuga.
• Early summer (June to July): oxeye daisy, field scabious, common knapweed, viper's bugloss, borage, cornflower, phacelia.
• High summer (July to August): yarrow, wild marjoram, betony, purple loosestrife, red clover, bird's-foot trefoil.
• Late (September to October): devil's-bit scabious, teasel, tansy, evening primrose, asters, calendula if you keep deadheading.

Single, open flowers are what you want. Doubles and heavily bred bedding varieties often hold little or no accessible nectar, which is why a cheap packet of cornfield annuals will outperform a tray of petunias every time.

Sowing a Small Space Properly

Wildflowers want poor ground. Don't dig in compost or feed them, or you'll grow lush leaves and very few flowers. For a container, use a lean, gritty mix — two parts soil-based compost to one part horticultural grit is about right, and avoid anything labelled as moisture-retaining.

Sowing rates matter more than most people realise. As a rough guide:

• Cornfield annuals: about 2 to 5 g per square metre for a dense display.
• Perennial wildflower mixes: 1 to 2 g per square metre.
• A 30 cm pot: a pinch of seed, no more than 0.5 g. Overcrowding is the most common cause of failure.

Rake the surface to a fine tilth, scatter thinly, then press the seed in with a board or the flat of your hand. Most wildflower seed needs light to germinate, so barely cover it — a dusting of fine soil at most. Water gently with a fine rose and keep the surface damp for three to four weeks. Sow annuals in April or early September; sow perennials in spring or early autumn and expect them to spend the first year building roots rather than flowering madly.

Leave the Seed Heads Standing

This is the single kindest thing you can do. From October, resist the urge to tidy. Teasel heads, knapweed husks, yarrow umbels and hollow stems become winter bedrooms for solitary bees, lacewings and ladybirds, and the seeds are food for goldfinches. Frosted seed heads also look genuinely beautiful in low winter light.

Cut back in late March or early April, once you've had a run of mild nights. Take stems down to about 10 to 15 cm and leave the cuttings in a loose pile in a corner for a fortnight so anything sheltering can crawl out. On larger patches, cut only half each year, in alternate strips — that way there is always undisturbed habitat on the site.

Shallow Water, Safely Provided

Bees and butterflies need water, but they drown easily in a birdbath or a steep-sided pond. Fill a saucer or shallow tray with pebbles, broken slate or wine corks, then add water so it sits just below the top of the stones. Place it in the sun near your flowers and refresh it every day or two in summer, since mosquitoes breed in standing water left too long.

A patch of damp, bare earth in full sun is a bonus — male butterflies "puddle" there to draw up minerals from the soil. If you keep a shallow gravel tray, let it dry out occasionally rather than topping it up endlessly.

Keep It Going Year After Year

Give the patch a light hoe in early spring to knock back the strongest grasses, and top up with fresh annual seed each March so there's always a first-year buzz while the perennials wake up. In pots, refresh the top 5 cm of compost annually and divide clumping perennials every third year.

Expect the mix to shift as it settles: some species will fade, others will self-sow and wander into the gaps. That's not failure, it's succession. Watch what the bees visit most in your own patch — that's your best guide to what to sow more of next spring.