Spacing: 12-15 in. (30-38 cm) 15-18 in. (38-45 cm)
Hardiness: USDA Zone 3a: to -39.9 °C (-40 °F) USDA Zone 3b: to -37.2 °C (-35 °F) USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F)
Sun Exposure: Full Sun
Danger: Parts of plant are poisonous if ingested
Bloom Color: Light Blue Medium Blue
Bloom Time: Early (E) Early midseason (EM) Midseason (M) Late Midseason (MLa) Late (La)
Other details: Average Water Needs; Water regularly; do not overwater
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Propagation Methods: By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting: Bag seedheads to capture ripening seed Allow pods to dry on plant; break open to collect seeds N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
On Jun 7, 2011, rebloomnut from Cut Bank, MT (Zone 3a) wrote:
I have had this Iris for 2 years and it is finally going to bloom with 3 stalks on it. Although slow to settle in , I have it planted in the shallowest soil, hard due to clay and rock, sometimes completely bare of snowcover in the last 2 very harsh winters and then buried under feet of snow and later sat in pools of rain water.
It is tough as nails and I hope to have it for many years to come.
On Oct 21, 2005, laurief from Deer River, MN (Zone 3b) wrote:
Intermediate beardeds (IBs) generally do quite well in my growing conditions. This northern MN zone 3b climate inflicts severe, extended cold during the winter months, often with little snow cover for insulation. The summer growing season is short with temps that sometimes exceed 90 degrees F. My soil is very heavy, compacted clay with a slightly acid pH, though I grow my irises in well-amended, raised beds or windrows with improved friability and drainage. A large local deer population frequently tramples and sometimes grazes on my irises in early spring and late fall. Iris borers are present but managed successfully with a granular systemic grub control product. Weeds are abundant and only occasionally beaten back by an admittedly lazy gardener (yours truly). Fertilization is inconsistent, when provided at all. Different beds range from full sun to barely 5-6 hrs of sun a day.
AZ AP took a while to settle in here, but once it did, it proved glorious! This is a rampant increaser and abundant bloomer, handling my growing conditions and climate with ease and beauty. It flowers reliably each year with more and more stalks of beautiful light blue blooms. This iris should be resident in every garden.
On Apr 30, 2004, KDePetrillo from North Scituate, RI (Zone 6a) wrote:
This is a really sweet plant, and strudy to boot! I've had it about 12 years and it comes back strong every Spring, even when it's spent 4 or 5 days totally underwater (and irises DON'T like too much water!). It's a beautiful blue.