A Lavandin Variety. 30" x 24-30" wide, (cutting propagated). Summer Blooming. This long-stemmed beauty has the darkest blue-purple flower spikes of any of the French hybrid types. It is also the most cold hardy "French hybrid lavender":/catalog/search/products/french+hybrid+lavender/ cultivar. A heavy bloomer, the flowers have a strong lavender fragrance with a hint of camphor. The calyxes cling tightly to the flowering stems when dried, making 'Grosso' an excellent choice as an everlasting flower or for use in lavender crafts. Not recommended for fall planting in Zones 5 & 6. Zones 5-10. 5" deep Premium pot.