Cultivars
'Alba'
This tall plant to 1.5m (5ft) may spread up to 1m (3ft) with yellowish woody stems. The foliage is grey-green and the flowers are white arranged in whorls.

'Hidcote'
This compact sub-shrub has scented silver-grey leaves and forms a rounded habit. It produces dark purple flowers that appear through out the warmer months of the year.

It is planted along garden borders or used as an informal hedge and is suitable for patio pots and roof gardens. It prefers a well drained fertile moist soil in an open sunny position and has a medium water requirement once established (Scale: 2-drops from 3) and responds to mulching with an occasional deep watering during dry periods.

'Jean Davis'
This plant has pale pink flowers that appear during summer and has a dense rounded habit with blue green foliage. It is used in cottage gardens as a specimen or in group plantings.

It has a medium water requirement once established (Scale: 2-drops from 3) and responds to mulching with an occasional deep watering during dry periods.

'Loddon Pink'
This very compact plant only grows to 450mm (18in) tall produces soft pink flowers during summer. It prefers a well drained fertile moist soil in a sunny position and has a medium water requirement once established (Scale: 2-drops from 3) and responds to mulching with an occasional deep watering during dry periods.