Herb Border Design Ideas That Last All Year

A good herb border looks planned all year, not just in July. The secret is a skeleton of evergreens that holds the shape when the soft herbs die back.

Most herb advice is about growing: sun, soil and spacing. This guide is about how the border looks. It covers evergreen bones, height, colour, repetition, gravel and edges, with a simple planting plan. For the growing side, see our guide on how to grow herbs. If you’re starting a whole herb garden from scratch, our guide to creating a herb garden covers choosing the spot and the layout.

Why does a herb border look bare in winter?

Because most culinary herbs are herbaceous: they die back to the root in autumn and regrow in spring. Fennel, lovage, angelica, chives, tarragon, sorrel, oregano and mint all do it.

Nobody plans a herb border in February. People plan it in summer, when everything is full and fragrant. So the plant list is chosen at its best and has no reason to include anything evergreen. Come December, there’s nothing left standing.

Think of a border as structure and infill. Structure is what’s there all year: clipped evergreens, edges, gravel, paths and walls. Infill is everything that comes and goes. Herbs are mostly infill. Give them a skeleton and the same herbs suddenly look deliberate.

Mid-winter, and only the evergreens are left. Without them, this would be bare soil until spring.

Borrow ideas from the walled kitchen garden

Old walled kitchen gardens and physic gardens grew scruffy, seasonal plants but still looked tidy in midwinter. They did it with layout rather than planting.

Their beds were straight, the paths were generous and low clipped hedges drew lines that showed even when nothing was growing. You can borrow the same ideas for one border in an ordinary garden:

• A straight, crisp front edge that holds its line in January.
• Repeated clipped shapes spaced evenly along it.
• A path or gravel that reads as a surface, not a gap.
• Symmetry or rhythm, so the eye sees a plan rather than a collection.

If you love this look, a knot garden takes the clipped geometry even further.

How much of a herb border should be evergreen?

Roughly a third. Much less and the border looks patchy in winter. Much more and it turns into a shrub border with a few herbs squeezed in.

Judge it by how much you see in winter, not by plant numbers. Nine small clipped domes count for more than twenty clumps of chives, because the chives aren’t there in January.

A quick test: sketch the border twice, once in summer with everything, and once in winter with only the evergreens. If the winter sketch is nearly empty, add more structure.

Spread the evergreens evenly along the border. A clump at one end and nothing at the other gives you half a border in winter.

Good evergreen herbs and partners include:

• Rosemary for height and dark green.
• Sage and santolina for soft grey mounds.
• Thyme and winter savory for the front edge.
• Bay, clipped into a cone or ball, as a full stop at each end.

Repeated clipped domes are a quiet green line in summer. In winter, they’re what makes the border still look designed.

What to use instead of box

For centuries box (Buxus sempervirens) was the go-to edging. Today it’s a risky choice, because box blight and the box tree moth are widespread across much of England. The RHS guide to box blight explains how hard it is to get rid of.

Good alternatives for a herb border:

• Ilex crenata (Japanese holly). Small dark leaves and a dense habit, so it clips into neat domes and low hedges. Plant it in soil that drains well.
• Teucrium fruticans (shrubby germander). Silver-grey, evergreen and very at home with Mediterranean herbs. Give it a sunny, sheltered spot, as hard winters can damage it.
• Dwarf yew (Taxus baccata). A darker, heavier line. It hates wet roots, so avoid soggy clay.
• Bay (Laurus nobilis). Better as an accent than a hedge, and it’s a herb anyway.

Our guide to box hedge alternatives compares more options in detail.

Layering heights from fennel to thyme

Most herbs grow to between 30 and 60cm, so a border of them can look like a flat green mat. Plan three tiers.

Back tier, about 1.5 to 2m. Bronze fennel is airy and see-through, a haze of fine bronze leaves you look past rather than at. Angelica has big green flower heads in early summer, then usually dies after setting seed, so let a few seedlings grow on to replace it.

Middle tier, about 50cm to 1.2m. Rosemary, sage, shrubby germander, lovage, hyssop and oregano. This is where most of your cooking herbs live.

Front tier, up to about 40cm. Clipped domes, santolina, chives, winter savory and creeping thyme spilling over the edge.

Two tricks make it work. Don’t build a neat staircase: pull a tall plant forward every few metres so the tiers mingle. And use see-through plants on purpose. Bronze fennel near the front, with the border visible through it, looks lovely. For growing tips, see our guide to growing fennel as a herb.

Bronze fennel screens without blocking. Low evening sun through the flower heads is a treat in late summer.

Silver herbs against warm brick

Many Mediterranean herbs have silver, grey or blue-green leaves. Fine hairs and waxy coatings help them cope with sun and drought, and those surfaces look silver to us.

Lavender, santolina, artemisia, sage, thyme, curry plant and shrubby germander all share it. Against warm red brick, cool silver looks fresh and calm. Unlike flowers, the foliage is there every day of the year.

Too much grey can look flat on a dull British day, so break it up:

• Dark green from rosemary, bay or clipped domes.
• One gold or purple, such as golden oregano or purple sage.

Silver leaves against warm brick, lifted by a splash of golden oregano. This combination looks good all year.

Make the most of a sunny wall

A south-facing wall is the best backdrop a herb border can have. Brick soaks up the sun’s warmth during the day and gives some back at night. The base of the wall also stays drier, which Mediterranean herbs love.

That shelter can help rosemary, myrtle, bay and French tarragon through cold, wet winters that might kill them in the open. Use it well:

• Put the more tender evergreens close to the wall, where it’s warmest.
• Keep basil and coriander out in the open border. They gain nothing from the wall and may bolt faster.
• Watch out for the dry strip at the foot of the wall. New plants there need watering in their first summer.
• Don’t cover the wall with a vigorous climber. It shades the brick and cancels out the warmth.

Shadier walls aren’t wasted. Mint, chervil, sweet cicely, parsley and lovage are happy with half a day of sun.

Repeat plants for a planned look

Choose three or four plants and repeat each of them along the border. This one change does more for the look than anything else.

The natural urge is to collect one of every herb you might cook with. That gives you a plant collection, not a border, and the eye reads it as clutter. Repetition gives the eye a pattern to follow.

On a 6m border you might repeat:

• A clipped evergreen dome every 1.5m.
• Santolina in three groups.
• Chives in five clumps, evenly spaced.
• Bronze fennel three times, with one pulled forward.

Tuck all the one-off kitchen herbs into the gaps between. The repeats carry the design, and the singletons hide inside it.

A simple planting plan for a 1.2m by 6m herb border

This plan suits a sunny border against a wall or fence on well-drained soil. Spread each group evenly along the 6m run.

Plant the evergreens first and space them evenly. Then fill the gaps with the soft herbs. This gives you a border that holds its shape in winter and is full of things to cut in summer.

Gravel mulch for drainage and looks

Gravel keeps the crowns of Mediterranean herbs dry, and it gives the border a tidy surface in winter. Bare earth looks neglected. Gravel looks deliberate.

A few tips:

• Use angular grit, not rounded pea shingle. Angular pieces lock together. Pea gravel rolls onto paths.
• Spread about 5cm over the soil around the plants.
• Match the colour to your wall: buff gravel with red brick, grey gravel with grey stone.
• Skip the weed membrane if you like self-sown herbs. Thyme rooting into gravel at the edge looks great.

For a whole garden in this style, see our guide to creating a gravel garden.

Thyme spreading into angular gravel at the border edge. The gravel keeps the crowns dry and the line neat.

Paths and edges that hold the shape

Edges and paths last all year, so they matter as much as the plants. Herbs flop and sprawl, so the frame around them needs to be crisp and straight.

Good edging options:

• Brick on edge, matching the wall. The classic kitchen garden choice.
• Stone setts for a cleaner line.
• Steel edging for an almost invisible edge that keeps gravel in place.
• Clipped domes or a low hedge as a green edge.

Make paths generous. About 60cm is enough to walk, but 90cm lets two people pass and lets you crouch to pick without stepping in the border. Keep the lines straight: curves fight the sprawling planting. Our garden edging ideas guide has more on materials.

Straight brick edges and a generous path do a lot of the work. A path this wide lets you pick without treading on the border.

Herb border calendar: what to do each month

Use this as a rough guide for a herb border in southern and central England. Things happen a week or two later further north.

Common herb border mistakes

1. Planting only soft herbs. The most common problem by far. Without evergreens, the border is bare from December to March.
2. One of everything. Collecting gives you clutter. Repeat a few plants and tuck the one-offs in between.
3. Blaming the cold for winter losses. On heavy soil it’s usually wet that kills rosemary and thyme. Good drainage and gravel save more plants than fleece. Fleece over a wet plant can make things worse.
4. Replanting box. Blight and box tree moth are common. Choose Ilex crenata or another alternative.
5. Making the border too narrow. Under about 1.2m, three tiers don’t fit and the back row flops forward.

A herb border built to be cut from as well as looked at. Straight edges and repeated domes work in any back garden.

Ready to plant? Our guide to growing rosemary is a good next step for the backbone of your border, and you’ll find more design ideas on the garden design hub.

Frequently asked questions

Why does my herb border look dead in winter?

Most culinary herbs die back to the root in autumn. Fennel, lovage, chives, tarragon and oregano all disappear over winter. If nothing evergreen is planted with them, the border is bare soil until spring. The fix is evergreen structure, not different soft herbs.

Which herbs stay evergreen through a UK winter?

Rosemary, sage, thyme, winter savory and bay keep their leaves all year. Bay and rosemary give height, sage and santolina give mass, and thyme and winter savory hold the front edge. Hyssop is semi-evergreen and may drop its leaves in a hard winter.

What can I use instead of box for herb border edging?

Ilex crenata is the closest match to box. It has small dark leaves and clips into neat low domes or hedges, without box blight or box tree moth. It dislikes waterlogged soil. Dwarf yew and shrubby germander (Teucrium fruticans) are other good choices.

How tall should the back of a herb border be?

Aim for plants of about 1.5 to 2m at the back. Bronze fennel and angelica both reach that height and are airy enough to see through, so they don’t block the view. Clipped bay makes a solid evergreen full stop at each end.

Do herbs really need gravel mulch in a UK border?

On heavy or wet soil, yes. Rosemary, thyme and sage are killed by winter wet more often than by cold. About 5cm of angular gravel keeps their crowns dry. It also looks neat in winter when much of the planting has gone.

Can a herb border work in a shady garden?

Yes, with a different plant list. Mint, chervil, lovage, parsley and sweet cicely cope with part shade. Rosemary, thyme, sage and lavender need a sunny spot, so leave them out. A shady herb border is greener and softer, without the silver foliage.

How wide does a herb border need to be?

At least 1.2m for three height tiers. Below that the tall back row tends to flop into the front. In a narrower space, plant a single repeated row of clipped evergreens with low herbs in between.