Long-flowering plants for months of colour.
The secret to a border that never has a dull moment is long-flowering plants – perennials that bloom for months rather than a fleeting fortnight. Build a scheme around these workhorses and your garden stays full of colour from early summer right through to the first frosts.
First 3 designs free · no card · UK plants
How to keep a border in flower for months
Most plants flower for two or three weeks and then stop. The trick to a long season is two-fold: build the backbone from genuine long-flowerers that bloom for months, then layer in a succession of others so that as one group fades, another comes into its own.
Deadheading helps enormously – many perennials will flower again if you remove the spent blooms – and a mix of early, mid and late plants means there is never a gap. The result is a border that earns its keep from June to the frosts.
The best long-flowering plants
Your planting plan lists them in full, with how big each grows and where each goes – so the garden in the picture is one you can actually plant.
Salvias
violet-blue spires that flower from June until the frosts
Hardy geraniums
some varieties flower for months, especially if cut back
Catmint
a long haze of blue, and again if trimmed after the first flush
Coneflowers
bold daisies that bloom right through late summer
Rudbeckia
golden daisies for a long, glowing late-season show
Erysimum 'Bowles's Mauve'
near-constant flower for most of the year
Verbena bonariensis
tall purple that flowers on and on into autumn
Gaura
delicate butterfly flowers over an exceptionally long season
Japanese anemones
carry the border through late summer into autumn
Dahlias
flower relentlessly from midsummer until cut down by frost
See a long-season border on your own garden
Upload a photo of your border and get it back designed for a long season of colour – a photorealistic picture, with a planting plan built to flower for months, not weeks. Starting a border from bare soil? The garden border planner lays out the whole border from one photo, so you can see it planted before you buy a single plant.
The plan includes a month-by-month flowering calendar so you can see exactly when everything performs. Your first 3 garden designs are free, so you can see it before spending anything.
Where to go next
Plants that flower for months rather than weeks are the backbone of cottage planting and the single biggest reason a low-maintenance garden still looks good in August.
They also keep a front garden presentable with almost no work, which is usually the point.
Good to know.
Everything people ask about long-flowering plants.
How does the AI garden design work?
Upload a photo of your garden or a single border, and tell us what you'd like: refresh your borders, keeping your garden's shape, or redesign the whole space with new layout, paths and planting. Pick a style, and we generate a photorealistic redesign of your actual garden. When you love one, unlock its planting plan – every plant, how big each grows, and where each goes.
Are the plants real – can I actually buy and plant them?
Yes. Every design can become a planting plan of real, available UK plants, with each plant's mature height and spread, where it goes and a month-by-month flowering guide. The plans are built on real horticultural data and shaped by a professional gardener – not generic AI guesses – so the garden in the picture is a garden you can genuinely plant.
Is it really free, and what does it cost after?
Yes, your first 3 garden designs are free, straight away. Free designs carry a small watermark. Pro is £29 and Max £49, each one payment that covers your whole project, and every design you make with either comes with every plant named, plus a clean, higher quality image that is yours to keep. Pro makes two designs at once, Max four.
Which perennials flower the longest?
Salvias, erysimum, gaura, coneflowers and many hardy geraniums flower for months rather than weeks, especially with a little deadheading. Dahlias bloom relentlessly from midsummer until the first frost.
More planting guides.
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