How to Grow Herbs in the UK — A Complete Guide to Growing Your Own Herbs

There's something deeply satisfying about stepping into your garden — or onto your balcony — and snipping fresh rosemary, basil, or mint for tonight's dinner. Growing herbs in the UK is one of the most rewarding gardening projects you can take on, whether you have a sprawling allotment, a modest border, or a few pots on a windowsill.

Herbs are naturally resilient plants that thrive in our temperate British climate. Many are drought-tolerant once established, most are unfussy about soil, and the majority will keep producing from spring right through to the first autumn frosts. Best of all, a £3 packet of seeds can save you a fortune on supermarket fresh herbs — which typically cost £1-2 per tiny plastic punnet.

In this guide, I'll walk you through everything you need to know about growing herbs in the UK: which varieties to choose, how to plant and care for them, and how to harvest at the right time for the best flavour. Let's get started.

Choosing the Best Herbs for UK Gardens

The first decision is which herbs to grow. Some herbs are naturally suited to our cooler British summers, while others (like basil) prefer a bit more warmth and are better grown in a sunny spot or under cover.

Hardy Perennial Herbs (Plant Once, Harvest for Years)

These are the backbone of any UK herb garden. They survive our winters with minimal fuss and come back year after year:

• Rosemary — An evergreen shrub that thrives in well-drained soil. It's virtually drought-proof once established and flowers with delicate blue blooms in spring. Perfect for roasting dishes.
• Thyme — A low-growing carpet of tiny aromatic leaves. Needs full sun and free-draining soil. Excellent in Mediterranean dishes and as ground cover.
• Mint — The most vigorous grower of all. Always plant mint in a container — it spreads aggressively via underground runners and will take over a bed within a season. Spearmint, peppermint, and apple mint are all fantastic.
• Sage — Soft, velvety leaves with a strong, savoury flavour. A compact shrubby plant that pairs beautifully with pork and in stuffing.
• Chives — Grass-like stems with a gentle onion flavour. The purple pom-pom flowers are edible too and make a pretty garnish.
• Oregano — Spreading perennial that's essential for Italian cooking. More flavourful when grown in poor, well-drained soil.

Annual and Tender Herbs (Yearly Planting)

These herbs need sowing each year or protection over winter, but they're fast-growing and productive:

• Basil — The quintessential summer herb. Needs warmth, shelter, and plenty of sun. Grow it in a greenhouse, on a sunny windowsill, or in a south-facing spot. Pinch out flower buds to keep it bushy.
• Parsley — Biennial (lives two years) but best treated as an annual. Soak seeds in warm water for 24 hours before sowing to speed up germination, which can be slow. There are two types: curly and flat-leaf (Italian).
• Coriander — Quick-growing and bolt-prone. Sow little and often every 3 weeks from April to August for a continuous supply. The leaves are fresh and citrusy; the dried seeds are a staple spice.
• Dill — Feathery leaves with a delicate aniseed flavour. Goes well with fish and salads. Like coriander, it bolts quickly in heat, so sow successively.

Where to Plant Your Herbs

One of the great things about herbs is their adaptability. Here are the three main growing options for UK gardeners.

In the Ground

If you have garden space, create a dedicated herb bed near the kitchen door. Most culinary herbs need 6-8 hours of direct sunlight daily, so choose a south- or west-facing spot. Improve heavy clay soil with grit and well-rotted compost before planting. Mediterranean herbs like rosemary, thyme, sage, and oregano prefer poor, well-drained soil — don't add too much organic matter for these, or you'll get floppy, less-flavourful growth.

In Containers and Pots

Herbs are perfect for container growing. A Gardman Heavy Duty Planter 40L gives plenty of room for a mixed herb display, or use individual 20-30cm pots for each variety. Containers warm up faster than ground soil, which Mediterranean herbs love, but they also dry out quicker — water regularly in hot weather.

Always use pots with drainage holes and add a layer of gravel or crocks at the bottom. Fill with a mix of multipurpose compost and 20% horticultural grit for sharp drainage. This is especially important for rosemary, lavender, and thyme.

On a Windowsill or Balcony

Even without outdoor space, you can grow herbs on a sunny kitchen windowsill. Basil, chives, mint, and parsley all do well indoors. Turn pots regularly to prevent them leaning toward the light, and keep them away from draughty windows in winter. For balcony growers, the same container advice applies — group pots together to create a microclimate that retains moisture.

Planting and Caring for Your Herb Garden

When to Plant

In the UK, the main planting window is April to June. Hardy perennial herbs like rosemary, thyme, and sage can be planted from March onwards if the ground isn't frozen. Tender annuals like basil should wait until after the last frost (mid-May to June in most of the UK).

July is still a great time to plant many herbs. You can sow basil, parsley, coriander, and dill throughout July for late-summer harvests. Spring-sown herbs in pots can also be planted out now if you've been growing them on a windowsill.

How to Plant

When using a seed tray starter kit, sow herb seeds on the surface of moist compost and cover lightly with vermiculite or sieved compost. Most herb seeds need light to germinate, so don't bury them deeply. Keep the tray in a warm spot (18-22°C) and water from below by placing the tray in a shallow dish of water.

Once seedlings have two sets of true leaves, prick them out into individual pots. For planting in the ground or final containers, use a Burgon & Ball RHS Stainless Steel Trowel — the rust-resistant stainless steel head and ergonomic handle make light work of planting dozens of herb plugs.

Watering and Feeding

Herbs are surprisingly drought-tolerant, but container-grown plants need regular watering — every 1-2 days in hot weather, less in cool spells. Water in the morning so foliage dries during the day, which helps prevent fungal diseases.

Feed container herbs weekly with a liquid fertiliser like Gardman Growmore Plant Food. Herbs in the ground need less feeding — one application of slow-release fertiliser in spring is usually enough. Be careful not to over-feed Mediterranean herbs; they produce more aromatic oils when grown in lean conditions.

For watering, a Vitax 2-3L Watering Can with a fine rose attachment is ideal for gentle watering that won't disturb tiny seeds or damage fragile seedlings. Use a Hozelock Multi-Purpose Spray Gun for larger herb beds.

Pruning and Harvesting Your Herbs

Regular harvesting is the secret to a productive herb garden. The more you pick, the more the plant produces — cutting triggers bushier growth and prevents plants from becoming leggy or flowering too early.

• Basil: Pinch out the top pair of leaves once the plant has 6-8 leaves. Remove flower buds as soon as they appear — flowering stops leaf production and makes leaves taste bitter.
• Mint: Pick stems from the top, cutting just above a leaf node. Cut back hard (to 5cm above the soil) after flowering to encourage fresh growth.
• Rosemary and Thyme: Snip sprigs as needed from the top. A light trim after flowering keeps plants compact. Never cut back into old, woody growth on rosemary — it won't regrow.
• Parsley and Coriander: Cut outer stems first, leaving the centre to keep growing. Coriander bolts quickly in hot weather, so harvest regularly and sow fresh seeds every few weeks.
• Chives: Cut leaves 2-3cm above the soil. They'll regrow within weeks. The purple flowers are edible too.

The best time to harvest is early morning, after the dew has dried but before the sun is intense. This is when essential oil concentrations are highest, giving you the most flavourful herbs.

Common UK Herb Garden Problems

Slugs and Snails

Basil and coriander are slug magnets in damp UK summers. Protect young plants with copper tape on container rims or use Growing Success Slug Killer around vulnerable plants. See our full guide on how to deal with slugs and snails in UK gardens for more methods.

Aphids

Greenfly and blackfly can cluster on tender new growth. Blast them off with a jet of water, or use an H&C Cold Pressed Pure Neem Oil 500ml spray. Neem oil is organic and doesn't harm bees once dry. Read our guide on how to get rid of aphids naturally for more organic methods.

Poor Germination

Parsley is notorious for slow germination. Soak seeds in warm water for 24 hours before sowing, and be patient — they can take 3-4 weeks. Coriander and dill bolt (flower prematurely) in hot weather, so sow in partial shade during July and August.

Yellowing Leaves

Usually a sign of overwatering or poor drainage. Container herbs must have drainage holes. Let the compost dry out slightly between waterings. Yellowing lower leaves on basil specifically indicates it needs a warmer spot or more light.

Frequently Asked Questions

Final Verdict

Growing herbs in the UK is one of those rare gardening projects where the effort-to-reward ratio is heavily in your favour. A few pots, some seeds or young plants, and a sunny spot are all you need for a supply of fresh, flavourful herbs that will transform your cooking from June through October — and beyond, if you preserve wisely.

Start small. Pick three herbs you use most in the kitchen — I'd recommend basil, mint, and rosemary for beginners. Plant them in decent-sized containers with quality compost, water them consistently, and harvest often. You'll be amazed how quickly they grow and how much better homegrown herbs taste compared to the supermarket versions.

Once you've caught the herb-growing bug (and you will), the Herbal Age Grow Your Own Herb Garden Kit is an excellent next step — 12 herb varieties in one kit for under £15, enough to fill a whole border or a collection of pots. For nurturing those seedlings, a seed tray starter kit with humidity domes gives you the best germination rates and a head start on next spring's herb garden.

Happy growing! 🌿

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