Growing Herbs Together in Pots: Matching Water & Light

Illustration of a watering can beside pots of herbs

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Growing herbs together in pots is an efficient way to maximise space and create a convenient kitchen garden. However, success depends on grouping plants with similar environmental requirements. Herbs generally fall into two main categories: Mediterranean varieties that prefer dry, sandy soils and full sun, and moisture-loving herbs that thrive in richer, damper conditions. Planting a drought-tolerant rosemary with a water-hungry mint in the same pot can lead to one plant suffering from either root rot or dehydration.

Table of Contents

Matching herbs by light and water needs

To ensure all plants in a shared container thrive, you must match their biological needs. The most common mistake is treating all herbs as a single group. Instead, divide your selection based on their native habitats.

The Mediterranean group

Herbs from dry, sunny regions have evolved to survive in poor soils with limited water. They typically have small, tough, or silvery leaves to reduce moisture loss. These should be grouped together in a sunny, sheltered spot.

Compatible herbs: Rosemary, thyme, sage, oregano, marjoram, and winter savory.
Light: Full sun.
Water: Low to moderate; allow the surface to dry somewhat between waterings without drying the root ball completely.

The moisture-loving group

These herbs prefer more luxurious, fertile conditions and consistent moisture. They often have broader, softer leaves and are more prone to wilting if the soil dries out completely.

Compatible herbs: Chives, parsley and coriander; keep mint in its own pot.
Light: Partial shade to full sun.
Water: High; keep the compost moist but not waterlogged.

Selecting the right container and compost

The choice of pot and growing medium directly affects how water is retained and drained, which is critical when matching herbs.

Pot depth and drainage

Ensure containers have ample drainage holes in the base to prevent waterlogging. For herbs with deeper root systems, such as sage or rosemary, use deeper pots like ‘Long Tom’ styles to allow the roots to remain undisturbed. A minimum depth of 20cm is generally recommended for Mediterranean mixes.

Compost specifications

Avoid using a single universal compost for all herb groups. Instead, tailor the medium to the plant’s needs:

For Mediterranean herbs: Use a loam-based compost (such as John Innes No 1) and increase drainage by adding up to 25% coarse grit or perlite by volume. This prevents the roots from sitting in saturated media.
For larger perennials: Bay trees benefit from a heavier loam-based compost, such as John Innes No 3.
For moisture-lovers: Use a rich potting medium, potentially supplemented with garden compost or slow-release fertiliser to provide the nutrients they crave.

Practical planting and spacing

Proper spacing prevents plants from competing for nutrients and ensures adequate airflow, which reduces the risk of fungal issues like grey mould.

Planting steps

Drainage: Keep outlet holes open. Bridge a large hole if compost would escape, but do not add a gravel layer as a drainage fix.
Positioning: Place plants approximately 15-20cm apart.
Depth: Set the plants so the top of the root ball is about 2.5cm below the rim of the container.
Finishing: Firm the compost gently and water thoroughly. A mulch of gravel or bark can be added to the surface to keep foliage clean and retain some moisture.

Watering and feeding strategies

Watering needs vary significantly between the matched groups. Overwatering Mediterranean herbs can lead to root rot, while underwatering mint or parsley will cause them to struggle.

The finger test for moisture

Rather than following a strict calendar, use the finger test. Insert your finger about one-third of the way down into the pot. If the compost feels dry at that depth, it is time to water. In peak summer, this may be daily for moisture-loving herbs, but only every few days for rosemary or thyme.

Watering technique

Timing: Water in the early morning or evening to reduce evaporation.
Target: Apply water directly to the compost, not the foliage, to avoid spreading fungal diseases.
Volume: Water slowly until the compost is soaked, but stop just before or as soon as water begins to run out of the drainage holes to avoid washing away nutrients.

Feeding

Use a balanced fertiliser to encourage the growth of lush leaves. Avoid potassium-rich fertilisers, as these are designed to promote flowering rather than the leafy growth desired for culinary herbs.

Managing invasive and tender herbs

Some herbs require special considerations regardless of their water and light needs.

The mint exception

While mint shares water needs with chives and parsley, it should always be grown in its own separate pot. Mint is highly invasive; its roots will quickly spread and choke out any other herbs sharing the container.

Tender vs. hardy herbs

Match your herbs by their winter hardiness to simplify your overwintering routine:

Hardy perennials: Rosemary, thyme, sage, and oregano can live outdoors year-round once established.
Tender herbs: Basil and marjoram are frost-sensitive. These should be grown in containers that can be moved indoors to a sunny windowsill or a frost-free greenhouse during winter.
Semi-hardy: Many mints are hardy and die back naturally; French tarragon is more vulnerable to cold wet conditions. Protect their pots from freezing or saturation by placing them in the rain shadow of a wall or wrapping them in bubble polythene during extreme cold.

Diagnosing common pot problems

When growing herbs together, keep an eye out for these common issues:

Yellowing leaves/wilting: In Mediterranean herbs, this often indicates overwatering or poor drainage. In moisture-loving herbs, it can also indicate root problems, overwatering or nutrient issues; inspect the compost before acting.
Straggly growth: This is common in mint. The solution is to lift the roots and repot into fresh, rich compost.
Pests: Look for rosemary beetles, sage leafhoppers, and slugs. While aromatic foliage often deters insects, container plants in sheltered spots can still be targeted.

Useful products for this job

The links below open Amazon UK product searches. Check the exact item, seller, current price and compatibility before buying.

Loam-based potting compost: Recommended for Mediterranean herbs to provide the necessary structure and drainage. Ensure it is a loam-based mix rather than a purely peat-free multi-purpose mix for better stability with perennials. Search Amazon for Loam-based potting compost.
Horticultural grit: Used to increase drainage in compost for drought-tolerant herbs. Check that the grit is coarse enough to create air pockets; avoid very fine sand which can clog drainage. Search Amazon for Horticultural grit.
Deep planting pots: Provides the deep root run required for larger perennial herbs like sage and rosemary. Verify the pot has adequate drainage holes in the base. Search Amazon for Deep planting pots.

Related garden guides

Sources and further guidance

Guidance researched in September 2026. The feature image is an AI-generated illustration. Product guidance is based on published information, not hands-on testing.