Wildflower Archive

wetland wildflower

Giant blue iris

Iris giganticaerulea

Giant blue iris (Iris giganticaerulea)1 of 2
Biodiversity Heritage Library

Native to Alabama, Florida, Louisiana, Mississippi, and Texas

"Panhandle Florida (L. Anderson, pers.comm., 2021) west to eastern Texas." (Webref: 178).

  • Light Partial shade Sun tolerance
  • Moisture Wet Moisture preference
  • Zones n/a Cold to heat range
  • Bloom Mar–Apr Flowering time
  • Height up to 6 ft to 1.8 m
  • Life cycle Perennial Annual to perennial
Full details, see below

In the garden

A wetland wildflower for partial shade and wet soil. Its blue and purple flowers peak in April. At up to 6 ft, it needs room in rain gardens, pond edges, and damp low spots.

Growing conditions

Light
Full sun Partial shade Full shade
Moisture
Dry Moist Wet

When it blooms

The Giant blue iris's blue and purple flowers bloom March to April, peaking in April. It's a spring display.

Mar–AprJanFebMarAprMayJunJulAugSepOctNovDec

Giant blue iris blooms blue & purpleFoliage

Full plant details

Where it grows

Habitat
WetlandThe wild plant community it grows in.
Native range
Alabama, Florida, Louisiana, Mississippi, and TexasUnited States (5): AL, FL, LA, MS, TX. Where it grows wild on its own, by state and province.
Native distribution
"Panhandle Florida (L. Anderson, pers.comm., 2021) west to eastern Texas." (Webref: 178).The same native range, usually more exact than the state list, and often noting where it has spread beyond it.

Growing conditions

Light
Partial shadeHow much sun it takes, from full sun to full shade.
Moisture
WetThe soil dampness it prefers, from dry to wet.
Soil
Wet, rich soilsThe soils it grows in naturally.

Growth & form

Height
up to 6 ft (to 1.8 m)Typical mature height.
Life cycle
PerennialWhether it lives a single season (annual), two (biennial), or returns for years (perennial).

Flowers, foliage & fruit

Type
WildflowerWhat kind of plant it is.
Bloom
Mar–AprWhen it flowers.
Flower color
Blue, PurpleThe bloom color, or colors.
Fruit/Seeds
Capsule; ripens Apr–MayThe seed or fruit it sets after flowering.
Toxicity
None knownWhether any part is poisonous to people or pets.