Best Herbs to Plant in Pots in July: Your UK Guide

Introduction
July’s warm days and longer light hours create ideal conditions for pot-grown herbs. Containers offer flexibility—move pots to catch sun, protect against heatwaves or bring indoors for winter. Whether you’re a balcony gardener or have just a few tubs by the back door, choosing the right herbs now ensures fresh flavours for months. In this guide, you’ll discover ten of the best herbs to plant in pots in July, with tips on varieties, potting mix, watering, feeding and harvesting to keep your mini herb garden thriving through summer and beyond.

1. Basil

Why it’s great: Basil loves warmth and sun, producing lush leaves for pesto, salads and stir-fries.

• Varieties: ‘Genovese’, ‘Sweet Thai’, ‘Purple Ruffles’.
• Potting: Use a 20–25 cm pot with multi-purpose compost enriched with composted bark (for drainage).
• Planting: Transplant healthy 10 cm plug plants after the last risk of late chill.
• Care: Position in full sun (6+ hours). Water when the top 2 cm dries, avoiding waterlogged soil.
• Feeding: Apply a liquid feed every two weeks to encourage leafy growth.
• Harvest: Pinch tops regularly—snip above a leaf node to promote bushiness and delay flowering.

Basil responds instantly to pinching and feeding, rewarding you with continuous harvests all summer.

2. Coriander (Cilantro)

Why it’s great: Coriander offers dual use: fresh leaves for salads and seeds (coriander spice).

• Varieties: ‘Leisure’, ‘Santo’, slow-bolt types.
• Potting: A 15 cm pot with free-draining, moisture-retentive compost works well.
• Planting: Sow seeds thinly at 1 cm depth or transplant small plugs; sow afresh every three weeks for succession.
• Care: Keep soil evenly moist; partial shade in afternoon helps prevent bolting in heat.
• Feeding: Use a balanced liquid feed once a month.
• Harvest: Snip outer stems at soil level; leave inner shoots to regrow for up to four picks.

Succession sowing ensures a steady supply of both leaves and seeds through late summer.

3. Mint

Why it’s great: Mint is vigorous and perfect for infusions, cocktails and cooking, but contained growth is key.

• Varieties: ‘Spearmint’, ‘Peppermint’, ‘Chocolate Mint’.
• Potting: Deep 25 cm pots to accommodate spreading roots; use a mix of compost and grit to improve drainage.
• Planting: Divide a mature plant into sections or transplant a plug; mint tolerates partial shade.
• Care: Water when surface dries; avoid overwatering to deter root rot.
• Feeding: A slow-release granule feed at planting time suffices for the season.
• Harvest: Cut stems to just above a pair of leaves; frequent harvesting controls vigour.

Mint in pots never invades borders, and you’ll enjoy fresh sprigs throughout summer and autumn.

4. Parsley

Why it’s great: Parsley’s crisp leaves garnish dishes, and both flat-leaf and curly types thrive in containers.

• Varieties: ‘Flat Italian’, ‘Triple Curled’.
• Potting: A 15–20 cm pot with peat-free compost enriched with well-rotted manure.
• Planting: Sow seeds in modules (they germinate slowly) or transplant plugs after hardening off.
• Care: Position in partial shade; water regularly to maintain moisture, especially in heat.
• Feeding: Side-dress with liquid seaweed feed every three weeks for lush foliage.
• Harvest: Clip outer stalks at the base; new shoots emerge from the centre for continuous picking.

Parsley’s biennial habit means a July planting yields a strong autumn and winter crop if protected.

5. Thyme

Why it’s great: This drought-tolerant herb brings Mediterranean flavour to pots and tolerates neglect.

• Varieties: ‘English Thyme’, ‘Lemon Thyme’, ‘Silver Queen’.
• Potting: Use a shallow, wide 20 cm pot with a gritty, free-draining mix (50:50 compost and horticultural grit).
• Planting: Transplant firm-rooted plugs; thyme prefers full sun and minimal competition.
• Care: Water sparingly—allow compost to almost dry out between waterings.
• Feeding: A light application of slow-release fertiliser at planting is enough.
• Harvest: Snip sprigs just above woody growth; frequent light cuts keep the plant compact.

Thyme’s low-maintenance nature makes it perfect for busy gardeners and patio boxes.

6. Chives

Why it’s great: Chives offer oniony flavour and delicate purple flowers—all in a neat clump.

• Varieties: ‘Common Chives’, ‘Garlic Chives’.
• Potting: A 15 cm pot with fertile, moisture-retentive compost.
• Planting: Divide an established clump or plant plugs; chives like sun with some afternoon shade.
• Care: Keep soil slightly moist; avoid waterlogging.
• Feeding: A fortnightly feed with diluted compost tea encourages continual leaf production.
• Harvest: Snip leaves close to the base; cut flower stalks to redirect energy back into foliage.

Chives bounce back quickly from harvests—you’ll have fresh snips for omelettes and soups daily.

7. Rosemary

Why it’s great: Aromatic, evergreen and perfect for roasting, but needs plenty of sun and excellent drainage.

• Varieties: ‘Arp’, ‘Tuscan Blue’, creeping rosemary for containers.
• Potting: Use a deep 25 cm pot with compost mixed with sharp sand or perlite (30%) for drainage.
• Planting: Transplant young plants; avoid burying the stem too deeply.
• Care: Position in full sun; water sparingly once established, barely enough to stop wilting.
• Feeding: No regular feed needed—rosemary thrives in lean conditions.
• Harvest: Snip woody tips to encourage bushy growth; harvest before flowering for best flavour.

With minimal watering and feeding, rosemary pots stay attractive and productive for years.

8. Dill

Why it’s great: Fast-growing dill adds delicate fronds to salads and pickles; self-seeds readily if allowed.

• Varieties: ‘Fernleaf’, ‘Dukat’, ‘Delikat’.
• Potting: A 20 cm pot filled with rich, moisture-retentive compost.
• Planting: Sow seeds directly 1 cm deep; germination in 7–10 days. Thin to 10–15 cm apart for air flow.
• Care: Water when topsoil feels dry; dill prefers at least 4 hours of sun.
• Feeding: Monthly liquid feed ensures strong foliage and flower umbel development.
• Harvest: Cut fronds as needed; allow a few plants to flower and set seed for next season.

Dill’s airy form and quick growth make it a decorative and functional addition to herb pots.

9. Oregano

Why it’s great: Potent, hardy and evergreen, oregano brings a robust flavour to Mediterranean dishes.

• Varieties: ‘Greek Oregano’, ‘Golden Oregano’.
• Potting: Use a 20 cm pot with a free-draining mix—compost and grit in equal parts.
• Planting: Transplant plugs; prune back by one-third at planting to encourage branching.
• Care: Place in full sun; water sparingly once the plant establishes.
• Feeding: Light feed with slow-release granules at planting only.
• Harvest: Snip stems just above a pair of leaves; frequent harvesting keeps the plant compact and vigorous.

Oregano in pots is low-maintenance and evergreen, offering year-round culinary use when overwintered indoors.

10. Tarragon

Why it’s great: French tarragon lends a subtle aniseed flavour to sauces and dressings—best grown from root divisions.

• Varieties: True French tarragon (non-seeded), ‘Bronze’, ‘Mexican’ (seeded).
• Potting: A 20–25 cm pot with well-draining compost—add sand for extra grit.
• Planting: Divide established plants in July; ensure at least three healthy shoots per division.
• Care: Position in sun or light shade; water moderately, letting the topsoil dry slightly between waterings.
• Feeding: A single application of organic slow-release fertiliser at planting suffices.
• Harvest: Clip leaf stems before flowering for best flavour; pinch out flower buds to extend leaf production.

July divisions establish quickly, giving you robust tarragon for autumn and early winter harvests.

Conclusion
July is prime time to pot up a vibrant herb garden. From sun-loving basil, rosemary and thyme to moisture-craving parsley, coriander and dill, each of these ten herbs thrives in containers. With the right potting mix, regular—but not excessive—watering, and rhythmical harvesting, you’ll enjoy fresh, aromatic herbs all summer and into autumn. Embrace the flexibility of pot growing: move tubs to suit sun, shade or shelter, and even bring favourites indoors to overwinter. Start planting now, and your kitchen will flourish with home-grown flavours until the first frost.

Top 10 Questions & Answers

1. Can I plant herbs in pots in July?
   Yes—warm soil and long days favour rapid establishment and growth for most herbs.
2. How big should pots be for herbs?
   Use 15–25 cm diameter pots, deeper for vigorous rooters like mint and rosemary.
3. Do potted herbs need special compost?
   A good multi-purpose compost mixed with grit or bark for drainage suits most; parsley prefers richer mixes.
4. How often should I water potted herbs in July?
   Water when the top 2 cm feels dry—most need once or twice weekly, more in heatwaves.
5. Should I feed container herbs?
   Light feeding: fortnightly liquid for leafy herbs and slow-release granules at planting for Mediterranean types.
6. Can I overwinter potted herbs indoors?
   Yes—bring herbs like basil, parsley and oregano inside a bright windowsill before frost.
7. How do I prevent leggy basil?
   Pinch back regularly and rotate pots to ensure even light distribution.
8. Will mint escape the pot?
   Mint stays contained in a pot—never plant it directly into borders.
9. When should I harvest tarragon?
   Snip leaves before flowering for the best aniseed flavour; pinch out flower buds.
10. Can dill self-seed in pots?
    If you let some flower and set seed, dill will self-sow—but you can remove umbels to prevent spillage.