Teucrium marum aka Cat Thyme

Teucrium marum, known as cat thyme, belongs to the mint family, Lamiaceae. It is native to the west-central and central Mediterranean. Kew places it in the subtropical climate zone. It is not native to Britain or Ireland. This evergreen subshrub forms a small, dense bush. Its low shape suits small beds and other tight spaces.

Plants reach about 1.3 feet [0.4 metres] tall and wide. The RHS gives an upper garden size of 1.6 feet [0.5 metres] in both directions. Plants take two to five years to reach full size. The small, oval leaves have a grey-green tone. They give off a scent and have soft down beneath. Leaves remain on the plant through the year. Tiny pink flowers appear in late summer and autumn. They grow on spikes up to 0.4 feet [0.12 metres] long. The flowers add colour above the low, leafy growth.

Choose a sheltered site with full sun. A south-facing or west-facing spot meets the RHS guidance. The soil should drain well and have a neutral or alkaline pH. Chalk, loam and sand are all listed as suitable. It can grow in dry to moist soil, provided water drains away. The plant also tolerates drought. The RHS rates its hardiness as H3. This suits coastal districts and other mild parts of Britain. The rating covers minimum temperatures from 23 to 34°F [-5 to 1°C]. It does not indicate hardiness across colder inland areas.

Its small size suits pots, patios and courtyard gardens. The RHS also lists rock gardens, gravel beds and coastal gardens. It fits cottage gardens and borders beside walls. Its evergreen leaves provide cover outside the flowering season. Trim the plant lightly once the flowers have finished. Grow new plants from seed or take softwood cuttings in early summer. Semi-ripe cuttings offer another route in midsummer.

The RHS reports few routine pest or disease problems. That does not mean the plant can never suffer damage. It is harmful if eaten, so do not treat it as food. The RHS advises gloves and other protective gear when handling it. Its common name is not evidence that it is edible.