Iris sibirica
Siberian flag
Flower Colors
Description
A rhizomatous herbaceous perennial up to 1.2m tall, with narrow grassy foliage and branched stems bearing up to 5 violet-blue flowers 6-7cm wide in early summer, the falls veined purple on white at the base
Mature Height
1.5m
Mature Spread
0.5m
Plant Characteristics
Foliage
Deciduous
Growth Habit
Bushy
Growth Speed
Moderate · 0.4 m/yr
Soil Texture
ChalkClayLoamSand
Soil pH
AcidAlkalineNeutral
Soil Moisture
Moist but well-drained
Hardiness (RHS)
H9
Hardiness (USDA)
Zones 3-9
Flowering Season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Key Features
City and courtyard gardensCoastalCottage and informal gardenFlower borders and beds