Invasive Species Council of British Columbia
Grow Me Instead

Blue flag iris

Iris virginica

About This Species

Zone 5a

Grow me instead of Yellow flag iris

Blue flag iris is a herbaceous perennial wetland species popular for its pale violet-blue flowers with yellow centres. It grows 30 – 90 cm tall and has grassy green foliage. Blue flag iris is a good choice for wet and moist garden sites as it prefers acidic, boggy soils to thrive.

When selecting non-invasive plants for your garden, be sure to look for those that are suitable for your location, including moisture requirements, hardiness zone, and avoidance of known bear attractants among other factors.

Plant Special Features

  • Fire smart
  • Bear smart
  • Pollinator friendly

Moisture Requirements


Moist but well-drained conditions