Cottage Garden Plants & Planting Guide
Twelve RHS-cited cottage garden plants that thrive on heavy London clay, with the planting style that brings a real cottage border together.
Twelve RHS-cited cottage garden plants that thrive on heavy London clay, with the planting style that brings a real cottage border together.
A cottage garden is one of the most loved planting styles in Britain, and it works far better in a small SE London back garden than people expect. Voluptuous, generous, slightly chaotic in the best way. It is not the look of a designed scheme; it is the look of a garden that has been gently growing into itself for years.
This guide is the plant shortlist we use when we design a cottage-style border, drawn from the Royal Horticultural Society's cottage garden plants guide. Twelve plants that earn their place every year, all suited to the heavy London clay we plant into across South East London, all chemical-free.
A cottage garden is more a planting style than a plant list. The RHS describes the style as needing "voluptuous planting and haphazard self-seeding to get the look", with "a sense of jostling companionship" between plants. Get the style right and almost any sensible cottage plant will work; get the style wrong and even the right plants look like a normal border. The style boils down to five rules:
Hit those five and the rest is plant choice. Below are the twelve we reach for first.
The reason we love designing cottage gardens is that they are accidentally one of the best wildlife habitats a UK plot can grow. Foxgloves feed bumblebees, single-flowered roses bring in hoverflies and beetles, lavender and catmint pull in honey bees, hollyhocks support pollen-collecting bees, and aquilegia is a magnet for long-tongued bumblebees. None of that is a side-effect; it is what cottage planting was always doing before pesticides came along.
The catch is that you have to plant it the old way. Single-flowered roses, not the heavily bred doubles. Open-faced cottage hollyhocks, not the frilly ornamental varieties where the bees cannot reach in. And no chemicals, ever. We never use them on any garden we work on, and a cottage border kept chemical-free is one of the most generous things you can do for the local pollinator population.
So if anyone tells you a cottage garden is "just a pretty look", they have missed the point. The pretty look is what biodiversity looks like up close.
Cottage planting on heavy London clay is one of our favourite jobs. We design borders that lean on the plants that genuinely thrive here, not the picture-book ones that struggle. Planting plans are part of our garden design service, priced bespoke to your garden, never a fixed package, because every cottage border is shaped by the light, the soil and the existing structure. Send us a few photos on WhatsApp.
The first five entries are the RHS's defining cottage garden plants. The remaining seven are the reliable extras we add to almost every cottage border in SE London. You do not need every one; pick six or seven, plant them densely, and repeat the same few across the border for rhythm.
Where the plant prefers good drainage (and London clay does not), we have flagged it. Improving the planting hole with grit or planting on a slight mound is usually enough to keep these happy without rebuilding the whole bed.
Single-flowered varieties throughout. The bees need to be able to reach in.
Five RHS picks then seven workhorses. All thrive in SE London once the border has been improved with mulch, all are chemical-free, all earn their place every year.
The first of the RHS's five defining cottage plants. Tall purple-pink spires in June, biennial, self-seeds reliably so once you have it you have it for life. Native UK plant, prefers light shade and damp soil, which is why it loves a SE London cottage border. Digitalis purpurea Excelsior Group adds taller and more colour-varied forms.
The second RHS pick and the great cottage edging plant. Lavandula angustifolia "Hidcote" (AGM) is the classic compact form; Lavandula x intermedia "Sussex" (AGM) is taller and looser. Wants full sun and free drainage; on London clay we plant on a slight mound or in a raised edging. Hum-with-bees in July.
The vertical exclamation mark of a cottage border. The RHS recommends Belladonna and Elatum group cultivars; "Blue Dawn" (AGM) and "Tiddles" (AGM) are reliable picks. Stake them, protect from slugs, deadhead for a second flush. Prefer full sun and shelter from wind. On heavy clay they need the drainage improving but the result is the postcard cottage look.
The cottage scent. Early summer flowers with what the RHS describes as "overwhelming" scent. Tough deciduous shrub for the middle of a border or beside a path you walk past. "Manteau d'Hermine" (AGM) is the compact double; "Belle Etoile" (AGM) is the single-flowered classic. Easy on clay, sun or part-shade.
The defining cottage flower. The RHS picks Rosa "Madame Alfred Carriere" (AGM, climber), "Roseraie de l'Hay" (AGM, shrub) and "Cerise Bouquet" (AGM, large shrub). Single or semi-double cultivars feed the pollinators where heavily bred doubles do not. Roses love improved clay, full sun and a spring mulch.
The towering vertical accent against a wall or fence. Hollyhocks can hit 2 m, with single open flowers in pink, plum and white. Short-lived perennial that self-seeds. Watch for hollyhock rust on the leaves; it looks worse than it is and a properly mulched, chemical-free plant copes.
The cottage workhorse. Hardy geraniums fill the front and middle of every cottage border we plant. Geranium "Rozanne" (AGM) flowers from June to October without stopping, Geranium phaeum holds its own in shadier corners, Geranium macrorrhizum is the toughest of all for dry ground. Tough, long-lived, no real problems on London clay.
The cottage cousin of the delphinium, with the same vertical impact and a wider colour range. Russell hybrids in pinks, yellows, mauves and bicolours. Short-lived but self-seeds, which fits the cottage style. Watch for lupin aphids; finger-and-thumb them off, no spray needed.
The big-flowered showstopper for May and early June. Paeonia officinalis (the old "cottage peony") is the classic plant; Paeonia lactiflora cultivars give you a wider colour range. Long-lived, hates being moved, and once established in good clay they flower for decades. Plant the crown shallow; deep planting suppresses flowers.
The cottage scent that beats all the others. Annual climber sown in autumn or spring, grown up a wigwam of canes, picked relentlessly through summer for vases. The more you cut, the more it flowers. Single-flowered heritage varieties are the most fragrant; modern grandifloras are bigger but quieter.
The self-seeding cottage filler. Aquilegia vulgaris is the classic, but the species crosses easily so a few years in you end up with a happy mongrel cottage palette of pinks, mauves, whites and bicolours. Bonnet-shaped flowers in late spring, food plant for long-tongued bumblebees. Likes part-shade and clay.
The cottage edging plant for the front of the border, especially next to roses where the soft blue catmint balances the bigger rose flowers. Nepeta x faassenii or the taller "Walker's Low" (AGM) are the reliable forms. Bumblebees and honey bees pile in. Wants sun and decent drainage; on heavy clay, plant slightly raised.
Autumn (September to October) is the strongest window for most cottage garden perennials. The soil is still warm from summer, the rainfall is reliable, and the new plants have all winter to put roots down before they have to work in summer. Foxgloves, hardy geraniums, peonies, aquilegia and catmint all go in best in autumn.
Bare-root roses go in between November and March, when they are dormant. Bare-root is cheaper than pot-grown and gives you a stronger root system in the long run.
Sweet peas are sown in autumn (overwintering in a cold frame for the strongest plants) or in February to March for spring sowings. Hollyhock seed goes in in autumn or early spring. Spring (March to April) is the secondary window for everything else.
The cottage garden style does not arrive in year one. A freshly planted border in July looks like rows of perennials with bare soil between them. The plants need a year to bulk up, a second year to start jostling, and by year three they have grown into one another and the look becomes properly cottage. Aquilegia and foxgloves self-seed for next year somewhere around month nine, which is when the border starts to feel like it is gardening itself.
The other thing worth saying is that cottage gardens are not labour-free. They are lower-effort than a formal scheme but they do need a job or two: deadhead through summer to keep things flowering, cut back tired growth in late autumn or early spring, divide overgrown clumps every three or four years, and mulch the whole border with composted bark or leaf mould every March. That is genuinely the bulk of the work.
People often try to copy a famous cottage garden in one summer and feel let down by year one. Plant the bones in autumn, accept a quiet first season, then enjoy it from year two onward.
The shopping list is the easy part. The hard part is the layout: which plant where, how many of each, what colour next to what, where the structure goes. A cottage border can quickly look messy if it is not planned, and "haphazard self-seeding" only works once the underlying composition is right.
That is what we design. Cottage planting plans are part of our planting and garden design service, priced bespoke to your garden, never a fixed package, because every cottage border is shaped by the light, the existing trees and the structure around it. Same named gardener every visit, chemical-free, no shortcuts.
A cottage border is one of our favourite kinds of planting plan. Your gardener Josh designs the layout, picks the plants for your light and the heavy London clay, then plants the border properly. Bespoke and priced to your garden, never a fixed package, because no two cottage borders are the same.
The RHS lists foxgloves, lavender, delphiniums, mock orange and roses as the five defining cottage garden plants. A working cottage garden adds tough perennials such as hardy geraniums, peonies, aquilegia, hollyhocks and catmint, with sweet peas and lupins for early summer height. The look comes from voluptuous planting and a little self-seeded mess rather than a clipped scheme.
Most of them, yes. Foxgloves, hardy geraniums, peonies, aquilegia and hollyhocks all actively prefer the slightly damp, organic-rich soil that improved London clay becomes. The exceptions that want better drainage are lavender, catmint and some delphiniums; we plant those on a slight mound or improve the planting hole with grit.
Yes. A cottage garden is more a style of planting than a size; the RHS Wisley Cottage Garden was originally a courtyard plot. The trick is to keep the plant list tight (six or seven species, repeated), grow vertically with climbers and tall plants like hollyhocks and delphiniums, and accept that things will jostle into each other rather than sit in tidy rows.
Less than you would think. The cottage garden style is built around perennials that come back every year, so the main jobs are an annual mulch in spring, cutting back dead growth in late autumn or early spring, deadheading to keep things flowering, and dividing established clumps every few years. We never use chemicals, and a healthy cottage border rarely needs them.
Autumn is the strongest planting window for most cottage garden perennials, when the soil is still warm and roots establish before winter. Spring is the second-best option. Bare-root roses go in between November and March. Sweet peas are sown in autumn or spring.
Outstandingly so. A traditional cottage border is one of the best wildlife habitats a UK garden can grow. Foxgloves feed bumblebees, lavender and catmint pull in honey bees, hollyhocks support pollen-collecting bees, single-flowered roses feed hoverflies, and aquilegia is a magnet for long-tongued bumblebees. As long as you avoid double-flowered ornamental cultivars and never use chemicals, a cottage garden hums.
Yes. Cottage-style planting is one of the most popular requests we get for back gardens in Dulwich, Forest Hill, Brockley and the surrounding areas. Planting plans are part of our garden design service, priced bespoke to your garden, never a fixed package, because every cottage border is different. Message us on WhatsApp with a few photos and we will sketch a plan.
Improving heavy London clay is the first job before any cottage border goes in, so read our how to improve clay soil guide alongside this. For the design service, visit our planting plans and garden design service page.
Send a few photos on WhatsApp and we will design a cottage border that genuinely thrives on your London clay. Bespoke planting plans, no fixed package, no chemicals.