Key takeaways
- Creeping thyme needs full sun, sharp drainage and only light, occasional feet
- On heavy clay it rots in winter wet unless you raise the bed with grit
- Plant plugs 20-25cm apart in spring, not autumn, and weed by hand until they meet
- Lawn weedkillers kill thyme too, so every weed comes out by hand
- Shear lightly after flowering to slow the mat going woody and bare
- It works best between paving, on dry sunny banks and in small sunny patches
A creeping thyme lawn looks gorgeous: a fragrant purple carpet, humming with bees and never needing a mower. It can work beautifully, but only in the right spot. Thyme wants full sun, sharp drainage and very few feet. Give it shade, heavy clay or a busy path and it soon fails.
This guide is for anyone thinking about swapping grass for thyme. It covers where it thrives, how to plant it, how to weed and trim it, and the honest downsides. If you’re still weighing up chamomile, clover or moss, the guide to lawn alternatives and ground cover compares them all side by side.
Where does a creeping thyme lawn work best?
Thyme works best in small, hot, dry, sunny spots where people rarely walk. It comes from stony hillsides, so it loves heat and poor, gritty soil.
Good places for it:
- Between paving and stepping stones. The stones take the feet, the thyme fills the gaps, and the warm stone keeps it dry.
- Small sunny patches. A few square metres is easy to keep weeded. A whole back lawn is a lot of hand-weeding.
- Dry, south-facing banks. Slopes drain well, are awkward to mow, and nobody walks on them.
- Gravel gardens and seaside plots. Thyme copes with wind, heat and poor soil. The guide to creating a gravel garden shows how to work it in.
It usually fails in shade, on heavy clay, on north-facing ground and anywhere children or dogs run about.
Between paving is where thyme really shines. The stones take the feet and the thyme gets warmth and drainage.
Why creeping thyme fails in many UK gardens
Most thyme lawns fail for one of four reasons: wet soil, shade, compaction or weeds.
Winter wet is the big one. Thyme copes with cold but hates sitting in wet soil from autumn to spring. Its roots rot in waterlogged clay.
Shade comes next. Thyme needs at least six hours of direct sun in summer. In part shade it stretches, flowers thinly and opens up gaps.
Compacted soil stops the roots spreading. If you can’t push a finger into the soil, loosen it and add grit first.
Weeds are the one people underestimate. Thyme is low and slow. Anywhere it hasn’t covered, grass and weeds move in fast.
Warning: Don’t dig a gritty hole in solid clay and plant thyme in it. Water drains into the grit, hits the clay and sits there, so the plant drowns. Raise the bed at least 15cm above the clay instead, so water can drain away.
If your lawn is soggy every winter, the guide to fixing a waterlogged lawn on clay explains what’s going on underneath.
This is what months of soggy winter clay does to thyme. Wet, not cold, is what usually kills it.
Which creeping thyme is best for a lawn?
Thymus serpyllum (wild thyme) is the best all-round choice for a mat. It spreads well and flowers pink-purple in summer.
| Variety | Height | Flowers | Good for |
|---|---|---|---|
| Thymus serpyllum | 5-10cm | Pink-purple, June to August | The main mat, quickest cover |
| Thymus serpyllum ‘Pink Chintz’ | About 5cm | Soft pink, early summer | Grey-green woolly leaves, a pretty mat |
| Thymus ‘Coccineus’ | About 5cm | Magenta-red, early summer | Flat red carpets, a little slower |
| Thymus serpyllum ‘Elfin’ | 2-5cm | Pale pink, sparse | Tight little buns for cracks, not a lawn |
Mixing two or three spreading kinds gives a patchwork of colour. Keep tiny bun-forming types like ‘Elfin’ for gaps in paving.
Spreading types knit into a carpet, while bun-forming types stay as separate cushions. Choose a spreader for a lawn.
How to plant a creeping thyme lawn
Plant plugs in April, into weed-free, gritty soil in full sun. Spring planting gives the roots all summer to settle before winter.
- Clear the area of grass and weeds, roots and all. Any perennial weeds left now will haunt you later.
- Improve drainage. Dig in plenty of horticultural grit. On clay, build a raised bed at least 15cm high with a gritty mix.
- Rake it level and firm it gently.
- Plant plugs 20-25cm apart. Closer spacing knits faster and leaves less room for weeds.
- Water them in and keep watering in dry spells for the first summer.
- Keep off it until the plants have joined up, usually by the following year.
Plugs are cheaper than potted plants, which makes a difference over a few square metres. You can also take cuttings from your own thyme in summer to fill gaps for free. The guide to growing thyme covers cuttings in more detail.
Even spacing and gritty soil give thyme the best start. Plant in spring so the roots settle before winter.
Can you walk on creeping thyme?
Only lightly and now and then. Thyme isn’t like grass, which regrows from the base when it’s trodden on. Thyme grows from its stem tips, and squashed woody stems don’t bounce back well.
A few footsteps a week, brushing past or the odd kneel is fine. A path to the shed, the washing line or the bins is not. If people cross it, lay stepping stones about a stride apart and let the thyme grow between them.
It’s also not a play lawn. Children and dogs running about will wear it into bare patches quickly. The guide to no-mow lawns suits busy family gardens better.
Weeding and trimming a thyme lawn
Every weed comes out by hand. Lawn weedkillers kill broad-leaved plants and leave grass alone, and thyme is broad-leaved. So anything that kills a dandelion will kill your thyme too.
A light trim once the flowers fade keeps the mat green and tight. Stay above the old brown wood.
Weed little and often, and do it after rain. Grass and weeds lift out whole from damp, gritty soil, but snap off from dry soil and regrow. The guide to common lawn weeds will help you spot what’s creeping in.
Shear lightly after flowering, in July or August. Trim off the old flower stems and a little of the green growth with shears. Don’t cut into old brown wood, as it rarely sprouts again.
Gardener’s tip: Ten minutes of weeding a week in a damp spring beats two hours in a dry July. Pull the weeds while they’re small.
How a thyme lawn changes over the years
A thyme lawn isn’t a plant-it-and-forget-it job. Expect it to change as it ages.
In the first year, the plugs spread and you weed the gaps. By the second year the plants should have joined into a mat, and it looks its best. From around the third or fourth year, older plants often turn woody in the middle, leaving bare rings that weeds move into.
Shearing after flowering slows this down. When bare patches do appear, dig out the woody plants and replant with fresh plugs or rooted cuttings. Think of it as a low, flowering planting that you refresh now and then, rather than a lawn that lasts for ever.
After a few years, old thyme can go bare in the middle. Cut out the woody bits and replant before weeds take over.
Is creeping thyme good for bees?
Yes. Flowering thyme is far better for bees than short-mown grass, and bumblebees love it. It flowers from about June to August.
That season is fairly short, though. A lawn left to grow with clover, selfheal and bird’s-foot trefoil offers flowers from spring to autumn. Thyme gives a dense burst of flowers for a couple of months. Both are good, and they work well together.
Bumblebees can’t resist flowering thyme. Pair it with other flowers so there’s food from spring to autumn too.
Creeping thyme or chamomile?
Both suit small, sunny, lightly used spots. Chamomile ‘Treneague’ is a non-flowering form that stays low and smells of apples when you brush it. It doesn’t flower, so it does little for bees. It also dislikes drought and winter wet, much like thyme.
Choose thyme if you want flowers and bees. Choose chamomile if you want a soft, green, scented patch. The guide to growing chamomile covers planting a chamomile lawn.
Creeping thyme lawn calendar
| Month | Job |
|---|---|
| January | Keep off it, especially when frosty |
| February | Firm back any plugs lifted by frost |
| March | Weed while the ground is damp. Order plugs |
| April | Plant new plugs. Weed between young plants |
| May | Water new plants in dry spells |
| June | Flowering starts. Enjoy the bees |
| July | Shear lightly once flowering finishes |
| August | Take cuttings from green shoot tips for gap-filling |
| September | Last big weed before growth slows |
| October | Rake fallen leaves off so they don’t smother it |
| November | Check raised beds still drain well |
| December | Note bare patches to replant in spring |
Common creeping thyme lawn mistakes
Planting in shade. Thyme needs full sun. In shade it thins out and weeds take over.
Planting on wet clay. Raise the bed with grit, or choose another plant.
Planting in autumn. Young plugs go into winter with few roots and often rot. Plant in spring.
Spacing too widely. Gaps fill with weeds before the thyme gets there.
Using it as a path. Feet crush the stems. Add stepping stones.
Using lawn weedkiller. It kills the thyme along with the weeds.
Frequently asked questions
Can you walk on a creeping thyme lawn?
Only now and then, not as a daily route. Thyme grows from its stem tips, and crushed woody stems don’t recover well. Lay stepping stones through it if anyone uses the area regularly.
Will creeping thyme grow on clay soil?
Not on unimproved clay, as it rots in winter wet. Build a raised bed at least 15cm above the clay, filled with a gritty, free-draining mix. Don’t dig a gritty hole in clay, as it fills with water.
How far apart should I plant creeping thyme plugs?
Plant plugs about 20-25cm apart. Closer spacing covers the ground faster and leaves less room for weeds. Wider spacing saves money but means more weeding while you wait.
Why has my creeping thyme gone woody in the middle?
Thyme gets woody with age and rarely regrows from old bare stems. Shear the mat lightly straight after flowering to keep fresh growth coming. Once the centre is bare, replant it with new plugs or cuttings.
Can you use weedkiller on a thyme lawn?
No, lawn weedkillers will kill the thyme too. They target broad-leaved plants, and thyme is one. Pull weeds by hand, ideally after rain when the roots lift out whole.
Is creeping thyme good for bees?
Yes, flowering thyme is far better for bees than short-mown grass. It flowers from about June to August. For flowers over a longer season, let part of a lawn grow with clover and other wildflowers too.
What is the difference between red creeping thyme and Thymus serpyllum?
Red creeping thyme is usually Thymus ‘Coccineus’, with magenta-red flowers. It’s flat and a little slower to spread. Thymus serpyllum, wild thyme, has pink-purple flowers and is a good all-round choice for a mat.
If thyme isn’t right for your spot, our guide to the best ground cover plants has options for shade, clay and busy corners. You’ll find more ideas in the garden design hub.
Our team produces practical UK gardening guidance from source research, contributor records and established horticultural practice. Editorial standards are overseen by Matt W.
