Zone: 4
Height:   50-70cm [20-27"]
Spread: 30-45cm [12-18"]
Bloom:  Late summer through September; long, arching wands of lavender-blue flowers; pollinator magnet attracts honeybees, bumblebees, mason bees, green metallic bees, masked bees, sphecid wasps, butterflies, moths, and various hoverflies!
Foliage:  Dark green, textured whorls of starry leaves around tall, wiry stems
Light: Sun to part shade
Water: Regular to moderate
Soil: Average with good drainage
Garden Location: Borders, naturalizing; dwarf selection opens design possibilities