This sub-shrub has slender woody branched stems that form a prostrate habit. It has small deep dark green oblong leaves and the deep blue funnel-shaped flowers appear profusely in terminal clusters from late spring to summer. 

Hardiness zones 7 to 10 

Lithodora diffusa is naturally found from south-west Europe to Turkey and Algeria growing in coastal scrub and thickets to mountain woodland margins. 

It prefers a well drained humus rich moist lime free soil that is tending acidic in an open sunny position and is slightly drought tolerant and moderately frost hardy.

This sub-shrub is grown for its flowers and its spreading habit. It is planted in small or cottage gardens as a ground cover or used in rockeries. It is also planted in patio pots establishing in 2 to 3 years and is suitable for coastal or low mountain regions. It is also used as a spillover along retaining walls and planted between stepping stones. ID 2797

Note:
The cultivar 'Heavenly Blue' is most commonly planted.

Lithodora (lith-ō-DO-ra) diffusa (di-FEW-sa)

Boraginaceae (BOR-ah-jin-AY-see-ee)
Lungwort