× Lavandula intermedia 'Grosso' (Lavender)

'Grosso' is one of the most widely planted lavandins in the world, and for good reason. It produces extraordinarily long, deep violet-purple flower spikes on tall stems that rise 30 to 32 inches above mounds of wide gray-green foliage that can spread 3 to 4 feet at maturity. The fragrance is intensely sweet and true, and 'Grosso' is the variety most often grown commercially for essential oil production.

Full sun and fast-draining soil are the two requirements that matter most. Heavier clay soils on the coast benefit from amendment with coarse sand or crushed gravel, and raised beds work well where drainage is uncertain. 'Grosso' is notably cold hardy for a lavandin. Once established it is highly drought tolerant.

Deer and rabbits avoid it, and the flowers are exceptional for bees, particularly bumblebees, throughout their midsummer peak. The dried blooms and foliage hold their fragrance well for indoor use.