A beautiful native wetland iris, blue flag is a valuable addition to rain gardens, pond edges, wet meadows, and other consistently moist places. Its pale to medium blue-violet flowers bloom in late spring and early summer, and its presence supports native bees and other pollinators.

 

Light

Blue flag iris grows best in full sun, but it will tolerate partial shade. For the strongest growth and best flowering, give it at least six hours of direct sunlight each day.

 

Soil

This iris prefers moist to wet, organic-rich soil that holds water well. 

 

Water

Keep the soil evenly moist throughout the growing season. Blue flag iris naturally grows in wet habitats and can even handle shallow standing water. It should not be allowed to dry out for long periods.

 

Fertilizer

Fertilizer is usually unnecessary. A light topdressing of compost can help improve soil over time, but avoid heavy feeding. This native iris does best with minimal care once established.

 

Pruning

After blooming, you may remove spent flower stalks if you want a tidier look or wish to reduce self-seeding. Best practice is to leave the foliage in place until it naturally declines. Leaving foliage and seed stalks over winter provides valuable shelter for native insects and small wildlife.