Slender Blue Iris (Iris Prismatica) is a perennial herb in the Iridaceae family with easy care difficulty. It requires medium to high watering and full sun or partial shade light in USDA hardiness zones 4-8. This plant is toxic to cats and dogs — keep it out of reach of pets.

Iris prismatica is a perennial herbaceous plant known for its slender blue flowers and narrow leaf blades, native to marshes and shorelines.

Slender Blue Iris

Slender Blue Iris

Iris Prismatica

Iris prismatica is a perennial herbaceous plant known for its slender blue flowers and narrow leaf blades, native to marshes and shorelines.

Quick Facts

Type
herb
Lifecycle
perennial
Care Difficulty
Easy
Water Needs
medium to high
Light
Full Sun, Partial Shade
Hardiness Zones
4-8

Safety

⚠️
Not Pet Safe
⚠️
Not Child Safe
☠️
Toxic

Growing Conditions

Soil Types:loamy, silty, peaty
Indoor:No
Outdoor:Yes
Garden Use:groundcover, pollinator attractor, erosion control

Care Calendar

Monthly care tasks for Slender Blue Iris

Jan
Prune
Feb
Fertilize
Mar
Repot
Apr
Water+
May
...
Jun
...
Jul
...
Aug
...
Sep
...
Oct
...
Nov
...
Dec
...

Expert Care Tips

Pro tips from botanists and plant experts

Watering Tip

Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.

Humidity Trick

Group plants together to create...

Growth Hack

Rotate your plant every...

Photo Gallery10+ photos

Slender Blue Iris
Slender Blue Iris detail

View leaf details, flowers, seeds & more in the app

Taxonomy

Family:Iridaceae
Genus:Iris