Purple is the colour of dusk and dawn, of wildflower meadows and ancient walled gardens. It carries a quality of richness that is difficult to achieve with any other colour in the garden — and yet, paradoxically, many of the plants that produce it most abundantly are modest, ground-hugging species that ask for little in return. Ground covers with purple flowers represent one of the most rewarding investments a gardener can make: plants that work hard, look beautiful, and improve year after year.
The range of purples available across ground-covering species is extraordinary. At one end of the spectrum sit the deep, saturated violets of ajuga and vinca, almost blue in certain lights, pooling in the dappled shade under trees like spilled ink. At the other end lie the soft lilac tones of catmint and creeping thyme, which blur into misty clouds when planted en masse along a sunny path or border edge. Between these extremes is an entire chromatic world: the sharp magenta of creeping phlox, the blue-purple of speedwell, the warm lavender of alliums, the near-pink of flowering thyme. Choosing among them is one of the more pleasurable challenges in gardening.
Beyond their beauty, purple-flowering ground covers perform a suite of practical functions that make them invaluable in any garden design. Their dense, low growth habit shades the soil, preventing the germination of weed seeds that require light to sprout. Their root systems bind soil on slopes and banks, preventing erosion that can undermine a garden’s structure over time. Many spread steadily outward each year, filling gaps and colonising bare patches without any intervention from the gardener. A well-chosen ground cover, once established, can transform a high-maintenance trouble spot into a virtually self-sufficient planting that asks for almost nothing.
Purple flowers also carry important ecological value. Many of the species in this guide are exceptional nectar sources for bees, butterflies, and other pollinators, which are drawn to blue-purple wavelengths with particular intensity. A garden planted with generous drifts of lavender, catmint, or creeping thyme in flower becomes alive with insect activity at the height of summer — a kind of low-level hum and flicker that adds a dimension to the garden beyond the purely visual. In an era when pollinator populations are under increasing pressure, planting ground covers that feed them is a simple, meaningful act.
Ajuga (Ajuga reptans)
One of the most reliable and fast-spreading purple-flowering ground covers, ajuga produces upright spikes of vivid blue-purple flowers in spring above a carpet of attractive bronze or dark-green foliage. It spreads by surface runners that root wherever they touch moist soil, quickly blanketing shaded areas beneath trees and shrubs where few other plants will grow.
Creeping Thyme (Thymus serpyllum)
Creeping thyme forms a tight, fragrant mat of tiny leaves that in summer is completely covered in small pink-purple flowers beloved by bees. It thrives in poor, dry, well-drained soils and tolerates foot traffic, making it ideal for paths, cracks in paving, and rocky slopes. Its dense growth habit leaves no room for weeds to establish.
Vinca (Vinca minor)
Periwinkle is a classic ground cover producing glossy, evergreen foliage and periwinkle-blue to violet flowers from early spring. It spreads vigorously by rooting stems to form a dense, weed-suppressing carpet under trees and in shaded borders. The flowers have a distinctive, pinwheel shape and appear prolifically in spring with sporadic blooms continuing into summer.
Catmint (Nepeta × faassenii)
Catmint forms soft, billowing mounds of silver-grey aromatic foliage smothered in lavender-blue flower spikes from late spring into summer — and again in autumn if cut back after the first flush. Planted in generous drifts along sunny borders and path edges it creates a dreamy, hazy effect while smothering weeds and providing exceptional value to pollinating insects.
Lavender (Lavandula angustifolia)
Compact lavender cultivars such as ‘Hidcote’ and ‘Munstead’ function beautifully as ground cover when planted closely. Their silver-grey foliage and deep-purple flower spikes in midsummer are intensely fragrant and irresistible to bees. In well-drained, sunny situations they form a continuous low hedge or carpet that keeps weeds down and scents the air throughout the season.
Creeping Phlox (Phlox subulata)
In spring, creeping phlox completely obscures its needle-like foliage beneath a solid sheet of vivid purple, pink, or white flowers. The display is breathtaking and lasts for several weeks. The rest of the year it remains as a neat, low, evergreen mat that suppresses weeds on sunny banks, slopes, and rock garden walls with no maintenance required.
Speedwell (Veronica prostrata)
Prostrate speedwell produces a brilliant carpet of intense gentian-blue to violet flowers in late spring, covering its low mat of foliage almost entirely. It is particularly effective in rock gardens, along path edges, and on dry, sunny slopes. Once established it spreads steadily, forming a tight weed-excluding mat that remains attractive even when not in flower.
Deadnettle (Lamium maculatum)
Spotted deadnettle is one of the finest ground covers for dry shade, producing hooded pink-purple flowers above strikingly silvered foliage. It spreads rapidly by surface runners, filling difficult corners under trees and along dark hedgerow bases where weeds can be a persistent problem. Its variegated leaves remain decorative throughout the season long after flowering ends.
Mazus (Mazus reptans)
Mazus is a tiny creeping perennial that spreads quickly by runners to form a flat carpet of bright-green leaves, studded in spring with small but charming purple-and-white flowers with yellow-spotted throats. It is exceptionally useful between stepping stones and in paving gaps, tolerating light foot traffic while creating a dense, weed-excluding surface in moist spots.
Hardy Geranium (Geranium macrorrhizum)
Bigroot geranium is a workhorse ground cover with aromatic, semi-evergreen foliage and clusters of magenta-pink to soft purple flowers in late spring. Its thick rhizomes spread steadily to form a dense mat that is remarkably drought-tolerant and effective in dry shade beneath trees — one of the most challenging spots in any garden to keep weed-free.
Woolly Thyme (Thymus pseudolanuginosus)
Woolly thyme grows flat against the ground, forming an ultra-soft, grey, felted mat that occasionally produces tiny pink-purple flowers. Its horizontal, dense growth makes it nearly impenetrable to weeds, and the tactile quality of its silver foliage is exceptional in rock gardens and between paving stones. It thrives in the hottest, driest, most neglected garden spots.
Lilyturf (Liriope muscari)
Lilyturf forms dense clumps of arching, grass-like leaves and in late summer produces upright spikes of small violet-purple flowers resembling miniature grape hyacinths. Planted in drifts it creates a flowing, grass-textured carpet that suppresses weeds through sheer density. It remains evergreen in mild winters, providing year-round ground coverage under trees and in shaded borders.
Creeping Rosemary (Salvia rosmarinus ‘Prostratus’)
The trailing form of rosemary cascades over walls and banks, its needle-like aromatic foliage forming a woody, dense mat studded with pale blue-purple flowers in spring. It is superbly drought-tolerant and excels in hot, dry Mediterranean-style gardens, providing weed-suppressing coverage on challenging sunny slopes while offering a culinary harvest throughout the year.
Aubrieta (Aubrieta deltoidea)
Aubrieta is a spring favourite that cascades over walls and rock garden edges in sheets of purple, violet, or pink flowers. Its trailing stems spread quickly to form a weed-suppressing mat of small grey-green leaves, remaining attractive year-round. It is especially striking paired with yellow alyssum or white arabis in a rock garden or along a sunny retaining wall.
Oregano (Origanum vulgare)
Common oregano forms spreading, bushy mounds of aromatic foliage and in summer produces abundant clusters of tiny pink-purple flowers that are magnets for bees and butterflies. Its dense, low canopy shades out weeds in sunny, well-drained spots while doubling as a prolific culinary herb. Few ground covers offer such practical dual-use value in a small garden.
Ice Plant (Delosperma cooperi)
This succulent ground cover dazzles from early summer through autumn with a continuous display of vivid magenta-purple daisy-like flowers above fleshy, water-storing leaves. It spreads into a dense mat in hot, dry sites where little else thrives, covering sunny banks and gravel gardens while effectively excluding weeds through the sheer density of its succulent growth.
Allium (Allium oreophilum)
Dwarf ornamental alliums like Allium oreophilum naturalise readily, spreading by bulb offsets to form colonies of slender, grass-like leaves topped in late spring by pink-purple globular flowerheads. Planted in masses they create a naturalistic, meadow-like carpet that becomes denser and more weed-suppressing with each passing year as the colonies expand.
Salvia (Salvia × sylvestris)
Compact perennial salvias such as ‘May Night’ or ‘Caradonna’ form dense, spreading clumps of aromatic foliage with tall spikes of deep violet-purple flowers in early summer. When planted closely in drifts they create a weed-suppressing tapestry of colour and their persistent woody base prevents gaps from opening up where weeds might otherwise find a foothold.
Violets (Viola odorata)
Sweet violets spread prolifically by both stolons and self-seeding to form fragrant, heart-leaved carpets adorned in spring with deep purple, sweetly scented flowers. They thrive in the part shade at the foot of hedges and under deciduous trees, naturalising readily to create charming, informal ground cover that suppresses weeds while evoking old-fashioned garden romance.
Prunella (Prunella grandiflora)
Self-heal is a low-growing perennial that spreads steadily to form a dense, weed-suppressing mat bearing upright spikes of rich purple flowers from midsummer into autumn. It is highly attractive to bumblebees and tolerates mowing, making it an excellent choice for naturalising in a lawn or planting as an informal ground cover in partly shaded areas.
Geranium ‘Rozanne’ (Geranium ‘Gerwat’)
Perhaps the most celebrated garden geranium of recent decades, ‘Rozanne’ produces an almost uninterrupted succession of large, vivid violet-blue flowers from late spring until the first frosts. It sprawls outward energetically, covering the ground densely with attractive lobed foliage, and is exceptionally effective at suppressing weeds across large areas of a sunny or lightly shaded border.
Campanula (Campanula poscharskyana)
Serbian bellflower is a vigorous, trailing perennial that cascades freely over walls and across the ground, covering itself in a starry mass of lavender-purple bells from late spring through summer. It spreads rapidly by rooting stems and self-seeds freely, colonising cracks in paving, walls, and border edges while crowding out weeds with impressive efficiency.
Thyme ‘Coccineus’ (Thymus praecox ‘Coccineus’)
This vivid crimson-to-magenta-purple flowered thyme forms an exceptionally tight, flat mat of tiny dark-green aromatic leaves. In early summer the mat is almost entirely hidden by its intense flower display. Like other mat-forming thymes it thrives in poor, rocky, well-drained soils and suppresses weeds through its dense horizontal growth, while releasing fragrance underfoot.
Lithodora (Lithodora diffusa)
Lithodora produces an astonishing display of brilliant gentian-blue to purple flowers — some of the most intensely coloured in the plant kingdom — from late spring through summer. It forms a low, spreading mound of small, hairy, dark-green leaves that knit together into a dense ground cover in well-drained, slightly acidic soils in sunny rock gardens and raised beds.
Bugle Lily (Watsonia pillansii)
In warm climates, bugle lily naturalises freely from corms, spreading into colonies of sword-like leaves topped by elegant spikes of tubular purple-pink flowers. In regions where it thrives it forms expansive, self-maintaining drifts that crowd out weeds, particularly on sunny, well-drained banks. Its bold, structural foliage remains attractive throughout the year.
Hebe (Hebe pinguifolia)
Low-growing hebes like ‘Pagei’ form spreading mounds of small, grey-blue evergreen leaves studded in late spring with short spikes of small white to pale-purple flowers. Their woody, spreading structure covers the ground densely and requires virtually no maintenance once established. They are particularly effective in coastal gardens and in difficult, exposed, sunny spots.
Lavender Cotton (Santolina chamaecyparissus)
Cotton lavender forms a dense, silvery-grey mound of finely cut, aromatic foliage that spreads steadily to cover sunny, dry ground. Although its button-like flowers are yellow rather than purple, selected cultivars produce lavender-toned flowers and the silver foliage itself provides a perfect foil to purple-flowering companions. Its dense growth habit suppresses weeds effectively in Mediterranean-style plantings.
Calamint (Clinopodium nepeta)
Calamint is a low-growing, spreading perennial with tiny, mint-scented leaves and a prolonged summer display of small but profuse white to pale-lilac-purple flowers. It spreads steadily by underground rhizomes and self-seeding, forming a weed-suppressing mat that is one of the most valuable late-season nectar sources for small bees in the garden.
Lungwort (Pulmonaria officinalis)
Lungwort is a valuable early-spring ground cover for deep shade, bearing clusters of funnel-shaped flowers that open pink and mature to vivid blue-purple, providing some of the first nectar of the season for bees. Its large, heavily spotted, silver-and-green leaves expand to form a dense, attractive canopy through summer, suppressing weeds in the most difficult shaded positions.
Heather (Calluna vulgaris)
Heather forms a low, spreading, woody carpet of scale-like foliage that from late summer through autumn is completely smothered in tiny pink, purple, or white flowers. Planted in groups on acidic, peaty soils it creates a naturalistic moorland-style ground cover of extraordinary beauty that is nearly impenetrable to weeds and provides exceptional value to late-flying bees.
Erica (Erica carnea)
Winter heath is a tough, low-growing shrublet that produces masses of small urn-shaped flowers in shades of pink, purple, and white from midwinter through early spring — a remarkable season for colour in the garden. Its dense, interlocking, evergreen growth forms a weed-excluding mat that improves year on year, particularly on well-drained slopes and open, sunny sites.
Ground Ivy (Glechoma hederacea)
Ground ivy is a vigorously spreading native perennial with rounded, scallop-edged aromatic leaves and small purple-blue flowers in spring. It spreads by long, rooting runners to form a dense ground cover beneath hedgerows and trees, tolerating deep shade and compacted soils that defeat most ornamentals. The variegated form is particularly attractive in garden settings.
Thyme ‘Doone Valley’ (Thymus ‘Doone Valley’)
A hybrid thyme with attractive gold-variegated foliage and pink-purple flowers in summer, ‘Doone Valley’ is both ornamental and useful. It forms a low, spreading mat in well-drained, sunny spots and its variegated leaves remain decorative throughout the year. Like all mat-forming thymes, its dense horizontal growth habit suppresses weeds with great efficiency.
Phacelia (Phacelia tanacetifolia)
Phacelia is an annual ground cover used extensively by farmers as a green manure, and it makes an equally effective garden ground cover where speed of coverage is needed. It grows quickly from seed to cover bare ground in a carpet of finely cut, ferny leaves topped by gorgeous curling spikes of lavender-blue flowers that are magnetically attractive to bees.
Chives (Allium schoenoprasum)
Chives spread freely by both clump division and self-seeding to form dense colonies of slender, hollow, onion-scented leaves topped by decorative pink-purple globular flowerheads in early summer. Planted densely they create a productive, edible ground cover that suppresses weeds while providing a continuous harvest and attracting pollinators to the garden.
Nepeta ‘Six Hills Giant’ (Nepeta ‘Six Hills Giant’)
The largest and most exuberant catmint cultivar, ‘Six Hills Giant’ produces enormous billowing mounds of silver-grey foliage and long spikes of lavender-purple flowers from late spring. It spreads outward rapidly to cover a wide area and is highly effective at suppressing weeds along border edges, in front of roses, and on sunny banks where a bold, soft effect is desired.
Moss Phlox (Phlox douglasii)
Moss phlox forms an even tighter, lower mound than creeping phlox and is equally smothered in purple, lavender, or white flowers in spring. Its exceptionally compact, cushion-like growth habit makes it one of the best ground covers for rocky alpine gardens, raised beds, and cracks in dry stone walls, where it creates a weed-excluding carpet of great delicacy and charm.
Woodland Sage (Salvia nemorosa)
Woodland sage forms tight, spreading clumps of aromatic, wrinkled leaves and in early summer sends up numerous upright spikes of deep violet-purple flowers with contrasting dark calyces that remain ornamental long after the flowers fade. Planted in drifts it creates a dense, weed-suppressing carpet of extraordinary beauty that is among the best pollinator plants available.
Periwinkle ‘Illumination’ (Vinca minor ‘Illumination’)
This golden-variegated periwinkle combines the vigorous, weed-suppressing spreading habit of the species with bright gold-centred foliage that lights up shaded areas beautifully. Its violet-blue flowers appear in spring and sporadically throughout the season, and its ground-covering performance matches the standard form — making it one of the most visually striking ground covers for difficult shaded spots.
Thyme ‘Elfin’ (Thymus serpyllum ‘Elfin’)
The smallest of the mat-forming thymes, ‘Elfin’ forms a perfectly rounded, flat cushion of tiny aromatic leaves just a few centimetres high that is almost impossibly neat. In summer it produces a modest but pretty flush of tiny pink-purple flowers. Its extremely compact, dense growth habit makes it ideal for fine-detail use between small paving stones and in miniature rock gardens.
Globe Daisy (Globularia cordifolia)
A charming, low-growing alpine plant that forms a tight, spreading rosette of small, spoon-shaped leaves studded in spring with fluffy, round heads of pale lavender-purple flowers. It thrives in well-drained, rocky soils in full sun and spreads slowly but steadily to form a weed-excluding mat in rock gardens, scree beds, and along the edges of sunny paths.
Stachys (Stachys officinalis)
Betony is a low-growing native perennial with rosettes of wrinkled, toothed leaves that spread steadily to form a dense ground layer. In summer it sends up short spikes of bright magenta-purple flowers that are highly attractive to bumblebees. It naturalises well in meadow plantings and beneath light tree canopies, spreading quietly to suppress weeds over time.
Marjoram (Origanum laevigatum)
Ornamental marjoram produces a cloud of tiny purple-pink flowers on wiry stems above a spreading base of dark-green leaves from midsummer into autumn. It spreads steadily by underground runners to form a bushy, weed-suppressing mat and is one of the finest late-season nectar sources for butterflies and bees in the dry, sunny garden border.
Viola labradorica (Viola labradorica)
Labrador violet is a small but tenacious self-seeding perennial with distinctive dark purple-green foliage and delicate, small violet flowers in spring. It spreads prolifically by seed, colonising shaded borders, path edges, and gaps in paving to form an attractive, informal carpet. Its dark foliage provides a striking contrast to silver and yellow-leaved companions throughout the season.
Thymus ‘Highland Cream’ (Thymus citriodorus ‘Highland Cream’)
A lemon-scented thyme with cream-edged, variegated foliage and pale pink-purple flowers, ‘Highland Cream’ forms a low, spreading mat that is both ornamental and aromatic. It is particularly attractive in herb gardens and knot gardens, where its cream-and-green foliage provides colour contrast throughout the season while its dense growth habit suppresses weed germination effectively.
Linaria (Linaria purpurea)
Purple toadflax self-seeds generously to create colonies of slender, grey-green stems bearing long, elegant spikes of tiny snapdragon-like violet-purple flowers from early summer into autumn. Once introduced it maintains itself by annual self-seeding, gradually colonising sunny borders and gravel gardens to create a naturalistic, weed-suppressing carpet that rewards benign neglect.
Creeping Mint (Mentha × gracilis)
Spearmint and its creeping relatives spread aggressively by underground rhizomes to form aromatic, weed-suppressing mats in moist, partly shaded areas. In summer they produce small spikes of pale purple-lilac flowers that attract pollinators. Best contained in defined areas or beneath shrubs where their spreading habit is welcome, but extraordinarily effective at excluding weeds where space allows.
Erinus (Erinus alpinus)
Fairy foxglove is a diminutive self-seeding alpine perennial that colonises wall crevices, paving gaps, and rocky ground with rosettes of sticky, dark-green leaves topped by small but vivid pink-purple flowers from spring through summer. Its ability to establish itself in the most inhospitable cracks and crevices makes it an invaluable gap-filler that prevents weeds from gaining a foothold.
Geranium sanguineum (Geranium sanguineum)
Bloody cranesbill is a native perennial ground cover forming mounds of deeply divided, dark-green leaves that turn brilliant red in autumn. From late spring through summer it produces a long succession of vivid magenta-pink to purple flowers. It spreads steadily from its central rootstock and its dense, mounding growth habit effectively suppresses weeds in sunny and lightly shaded borders.
Isotoma (Isotoma axillaris)
Rock isotome is a spreading, mound-forming perennial or annual producing masses of small, star-shaped blue-purple flowers with a white centre from summer through autumn. In warm climates it spreads reliably to form a weed-suppressing carpet, and its long flowering season makes it exceptionally valuable for sustained colour and pollinator interest in sunny, well-drained garden spots.
Thymus ‘Purple Beauty’ (Thymus praecox ‘Purple Beauty’)
One of the most richly coloured of the mat-forming thymes, ‘Purple Beauty’ produces deep violet-purple flowers that are noticeably more saturated than most thyme cultivars, creating a vivid floral carpet in early summer. It forms the same tight, aromatic, weed-excluding mat as other creeping thymes and is particularly striking planted in sweeping drifts along sunny path edges and between stepping stones.
Wild Marjoram (Origanum vulgare subsp. vulgare)
The wild form of marjoram is a spreading, aromatic native herb that forms low, bushy mats of dark-green leaves smothered from midsummer into autumn in dense clusters of tiny pink-purple flowers. It self-seeds gently and spreads by underground rhizomes, naturalising beautifully in sunny, chalk or limestone-based soils while providing one of the most significant nectar sources for butterflies and bees in the late-summer garden.