Easy to grow in average, well-drained soils. Water deeply and regularly during the first growing season to establish an extensive root system; reduce frequency once established. For a neat appearance, remove old foliage before new leaves emerge. Divide clumps every 2 to 3 years in early spring.
- Light Needs: Full sun
- Watering Needs: Water regularly - weekly, or more in extreme heat, until established.
Dark violet-blue flowers held in tight clusters appear on tall stalks that emerge from bright green, strap-like foliage. Adds lush texture and stunning color at rear or mid-border, or plant in mass for a dramatic effect. Provides a gorgeous summer show in mixed containers. Herbaceous perennial.