Lavandula intermedia 'Grosso' is a classic French hybrid Lavender grown for its fragrant dark blue flower spikes and vigorous growth habit. With nice wide gray-green foliage, 'Grosso' is a large grower and blooms heavily providing an ample harvest of flowers for lavender wands, sachets, and culinary use. This is an outstanding honeybee plant providing mid-summer flowers after the English lavender finishes flowering in early summer. 'Grosso' has good cold hardiness for a French hybrid and thrives in zone 6 winters in well-drained soils.

Lavandula 'Grosso' is hardy to zone 10 only in dry, arid climates such as the West. This is not recommended for planting in a wet, humid environment such as the Gulf Coast, Southern TX or Florida.