Lavandula ×intermedia 'Grosso'

Common name(s): lavandin

Description: evergreen shrub; a 1972 discovery by M. Pierre Grosso, a French farmer. It is more vigorous and more resistant to the "dépérissement" that ravaged the 'Abrialii' fields in the 1950s and 60s. By 1975 it already accounted for 10% of French lavandin crop and by 1980 it was reported to be 55%. Though very high-yielding, the essential oil of 'Grosso' is strongly camphorous (considered lower quality) so it is most commonly used in the detergent, powders, etc. industries. 'Grosso' is currently the most commonly grown commercial lavandin in the world but it should also be noted that Pierre Grosso died in absolute poverty in 1989. Compact growth with silvery foliage and pungently fragrant, violet flower spikes on long stems in an open, fan-like pattern.

Height: to 3 ft. Spread: to 5 ft.

Stem length: 10-12 in.  

Corolla: violet-blue

Calyx: dark violet

Bloom season: mid summer

Best Uses: landscaping, rock gardens, essential oil, bouquets, crafts

Origin: M. Pierre Grosso, France (1972)

Position: full sun and well-draining soil

Winter Hardiness: to 0 F and below

Drought: adapted to 4 months of summer drought