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Iris virginica var. shrevei 'Southern Blue Flag'

Southern Blue Flag



  • Elegant, blue-violet flowers with yellow and white markings bloom in late spring
  • Bright green, sword-shaped foliage
  • Forms attractive clumps and spreads by rhizomes
  • Great for rain gardens and along water features
Border or Bed
Border or Bed
Cut Flower/ Foliage
Cut Flower/ Foliage
Garden
Garden
Long Blooming
Long Blooming
Low Maintenance
Low Maintenance
Native
Native
Water's Edge / Bog Plant
Water's Edge / Bog Plant



Homeowner Growing and Maintenance Tips:

Prefers medium to wet soil and full sun to partial shade. Can grow in up to 2-4 in. of standing water or in consistently moist soil. Plants can be divided after blooming. Wear gloves when dividing rhizomes as they are poisonous. Foliage can be trimmed back to 1in. above the crown after fall frost. Plants will naturalize to form colonies. 


Height: 12-36 in
Spread: 12-36 in
Bloom Color: Blue, Violet, White, Yellow
Zone: 5-9
 

Additional Characteristics & Attributes:


Attributes:

  • Naturalizing
  • Cut Flower/ Foliage
  • Garden
  • Water's Edge / Bog Plant
  • Long Blooming
  • Native
  • Border or Bed
  • Low Maintenance

Critter Resistance:

  • Deer Resistant

Exposure:

  • Full Sun

Habit:

  • Upright

Season of Interest (Flowering):

  • Spring

Attracts Wildlife:

  • Attracts Hummingbirds
  • Attracts Pollinators
  • Attracts Butterflies

Soil Moisture:

  • Wet Soil/Wetlands
  • Moist, Well-Drained


Genus Overview: Iris

Common Name: Northern Blue Flag Iris

Clump-forming plant with narrow, sword-shaped, blue-green leaves. Blue-purple flowers with purple veining and a central yellow and white blotch on the falls. Blooms late spring to early summer. Great for ponds, water gardens and wet borders.