Lavandula ×intermedia. Aka "Fat Spike Lavender." Ornamental, evergreen perennial herb. Fragrant violet blue flowers above aromatic evergreen foliage. High oil content. Prune back in early spring or late fall. Attracts butterflies. Good in herb gardens, borders, containers, and rock gardens. Grows 18-24" tall and wide. Blooms late summer through early fall. Full sun. Plant in light, well-drained soil. Zones 5-9.