Lavandula angustifolia Blue Spear ('Pas1213799')

Grow in full sun in well-drained soil; for more advice, see lavender cultivation

Pruning group 10, in early spring or mid-spring

Propagate by seed, because this is a seed strain: prechill for three weeks, then sow from late winter to spring at 15-18C on the surface of the compost; or by semi-ripe cuttings in late summer, or by softwood cuttings of new growth in early summer

May be susceptible to rosemary beetle, and to cuckoo spit (froghopper or spittle bug nymphs)

May be susceptible to honey fungus, grey moulds, lavender shab, and fungal leaf spots