Salvia 'May Night', a popular salvia with understandable reasons.  The bold blue blooms are borne on tall, yet sturdy, spikes over a long duration in summer.  A favorite of bees, hummingbirds, and butterflies.  Not bothered by many pests and a top landscape choice for single plantings or mass plantings.  Easy to grow and easy to care for.  Deadheading extends the blooming season.
Mature Plant Size: 18" Tall, 15"-18" Spread 
Bloom Time: June-August 
Light Exposure: Full Sun  
Soil Type/pH: Well-drained/6.0-7.5 
Hardiness Zones: 3-8
Fertilizer: Not needed in fertile soils, apply all purpose granular (preferably organic) in spring in poor soils
Container Size: 4.5" Pot