Blue King Siberian Iris
Iris sibirica
EYE-ris sih-BEER-ih-kuh
Perennials: Grandma's Garden
Siberian Iris
Zone
3: -40° to -30°
Min. Temp
Hardy: 28°
Easy, trouble-free group, forming clumps of grassy foliage with a late spring display of butterfly-like flowers. Plants are sturdy and upright, and seldom troubled by Iris borer. Cut the dying foliage back in late fall. Easily divided in early fall, every 3 to 4 years.
Appearance
Summer Foliage
Blue-Green
Fall Foliage
Variegated
Flower Color
Blue
Blooming Time
Early Summer - Mid Summer
Habit
Upright
Height
2–3 ft
Spread
18–24 in
Form
Iris
Characteristics
Type
Cultivar
Safety
Toxic to Dogs/Cats
Growth Rate
Moderate
Tolerance/Resistance
Cold Hardy
Attracts
Attracts Honeybees & Pollinators
Uses/Placement
Cut Flower
Optimal Growing Conditions
Sun Exposure
Full Sun - Part Shade
Soil Texture
Well-Drained
Soil Drainage
Moderately well-drained
Soil Moisture
Moist
Soil PH
Slightly Acidic: 6.0-6.5
PH Tolerance
Prefers slightly acidic soil
Soil Amendment(s)
Compost
Fertilizer
Moderate Feeder
Fertilizer Formula
Balanced Fertilizer
Fertilizer Timing
Pre-Bloom
Micronutrients
Trace Minerals Beneficial
Care
Care Level
Low
Behavior and Propagation
Spreading
Moderate Spreader
Propagation Method
Benefits from Pollinators
Propagation Licensing
Open propagation permitted
Division Timing
Divide After Bloom