Tall Bearded Iris 'Summit'


Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Summit
Hybridized by Stevens, J.
Registered or introduced: 1948
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Tall Bearded (TB)


36-48 in. (90-120 cm)


24-36 in. (60-90 cm)

36-48 in. (90-120 cm)


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

Sun to Partial Shade


All parts of plant are poisonous if ingested

Bloom Color:

Bright Yellow

White/Near White

Bloom Time:

Midseason (M)



This plant is resistant to deer

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Awards (if applicable):

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Concord, North Carolina

Gardeners' Notes:


On Nov 30, 2011, themikesmom wrote:

Summit TB 40" M Historic (((Happy Days x California Gold) x ((Lagos x((Gudrun x ( Lady Morvath x Rangatirall))) is the very first yellow and white amoena iris created and released in 1949 in New Zealand by Mrs J. Stevens along with the other Historic and more popular 'Pinnacle' yellow and white amoena released at this same time and was first available in the US, Summit has much more bright true yellow falls than Pinnacle, which is a pale pastel light yellow in color. Summit become known to the iris community when she was released to the USA in the 1954 Schrieners Iris Catalog.