Named a Must-Grow Perennial for 2013 by Better Homes & Gardens, Lavender Phenomenal has a full, mounding habit with fragrant spires of violet-blue flowers that arrive spring through summer. Hardy to zone 4, Phenomenal also tolerates summer heat and humidity with ease. Ideal for the fragrance garden or perennial border, Phenomenal provides a bounty of lavender for fresh bouquets, dried wreaths or sachets, lavender oils or culinary use.