Seven Mediterranean kitchen herbs: identity, growing and safe use

Herbs are often presented as an alphabetical medicine cupboard. That approach blurs plant identity, culinary tradition and evidence. This guide focuses on seven familiar kitchen herbs, how to recognise them and how to grow them. Culinary quantities and prescribed medicines are not interchangeable.

Rosemary and thyme

Rosemary is Salvia rosmarinus, formerly Rosmarinus officinalis. Its narrow leaves have rolled edges and pale undersides. Common thyme, Thymus vulgaris, forms a smaller woody shrub with tiny paired leaves. Both prefer sun and free drainage. Once established they tolerate dry intervals, but container plants still need checking.

Sage and bay

Common sage, Salvia officinalis, has soft grey-green leaves and dislikes a wet crown. Bay, Laurus nobilis, is an evergreen tree rather than a permanent small pot plant. Its leathery aromatic leaves are used to flavour food and removed before serving. Cherry laurel and oleander are not substitutes and are toxic.

Basil, parsley and spearmint

Sweet basil, Ocimum basilicum, needs warmth, regular moisture and repeated harvesting above a pair of leaves. Parsley, Petroselinum crispum, is usually biennial and can be slow to germinate. Spearmint, Mentha spicata, prefers more moisture than the woody Mediterranean herbs and spreads strongly, so a separate container is useful.

One herb bed is not one watering zone

Rosemary, thyme and sage can share a sunny mineral bed. Basil, parsley and mint generally need richer, moister conditions. Putting all seven beneath the same drip line either drowns the dry-climate shrubs or leaves the leafy herbs stressed. Group by water need, not by the word "herb".

Harvest and identity

• Use a verified nursery label and retain it until the plant is familiar.
• Harvest clean growth away from roads, pesticide drift and animal fouling.
• Never eat a wild plant based on a photograph or aroma alone.
• Dry leaves in a clean, airy place and discard mouldy material.

Health claims need a separate standard

A history of traditional use does not establish that a tea, essential oil or supplement treats disease. Concentrated oils can irritate or poison and some herbs interact with medicines or are unsuitable in pregnancy. Ask a pharmacist or clinician about a specific product and dose. Do not delay medical care in favour of a garden remedy.

Sources and review

This guide was reviewed in August 2026 with accepted names checked through Kew Plants of the World Online, growing guidance from the Royal Horticultural Society and medicine-safety information from the Spanish Agency for Medicines and Health Products.