Dark Purple Flowers on Blue Green FoliageLavender Grosso, Lavandula x intermedia ‘Grosso’, has attractive blue-green evergreen foliage. Hundreds of large purple flower spikes make an incredible display from mid to late summer. 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 and very fragrant – especially after a rain. The calyxes cling tightly to the flowering stems when dried, making ‘Grosso’ an excellent choice as an everlasting dried flower or for use in lavender crafts. Lavender prefers full sun and loose, light, well drained soil. Do not fertilize, over-rich soil will cause the plant to be less fragrant. Lavender is also used in sachets and potpourri. * Hundreds of Dark Purple Flower Spikes* Blue Green Evergreen Foliage* Full Sun.