Calamintha grandiflora is a perennial herb prized for its aromatic foliage and summer flowering. It grows to about 0.6 m and produces flowers from July to September. The plant prefers full sun in sandy or loamy, well-drained soils that may remain moist but drain freely. Fully hardy in the UK (H7), it suits rock gardens, borders and herb plots where the leaves can be appreciated up close.

Greater calamint (Calamintha grandiflora) is a fully hardy perennial with aromatic foliage and flowers from July to September.

https://en.wikipedia.org/wiki/Clinopodium_grandiflorum

Clinopodium is a genus of flowering plants in the family Lamiaceae, in the subtribe Menthinae. Clinopodium belongs to a large and complex group of genera including many New World mints such as Hedeoma, Monarda, and Pycnanthemum, and this group is in turn a sister clade to Mentha.

Calamintha grandiflora

Greater calamint | Calamintha grandiflora

Calamintha nepetoides is a perennial herb with a minty, aromatic scent and summer flowers. It suits well-drained, sandy or loamy soils of neutral to alkaline reaction and prefers full sun to partial shade. Flowering runs from July to September. Use it where its scent and late-summer flowers can be appreciated, such as rock gardens, herb plots and the front of borders.

Lesser calamint (Calamintha nepetoides) is a minty perennial that flowers July to September and suits south-facing rock, herb and border sites.