Tall Bearded Iris 'Midnight Oil'

Iris

Family
Iridaceae (eye-rid-AY-see-ee)
Genus
Iris (EYE-ris)
Synonym
Spacing
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
Hardiness
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
Sun Exposure
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)
Danger
Full Sun
Bloom Color
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction
Foliage
Dark Purple/Black
Class
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Bloom Time
Sun Exposure
Hardiness
Bloom Color
Bloom Time
Bloom Time
Non-patented
Bloom Color
Bloom Time
Bloom Time
Bloom Color
Bloom Color
Bloom Time
Other Details
Other details
Propagation Methods
Herbaceous
Seed Collecting
Soil pH requirements
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Patent Information
Awards (if applicable)
Foliage Color
Bloom Characteristics
Water Requirements
Where to Grow
Seed Collecting
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Fruit Shape
Fruit Size
Fruit Colors
Growing Habit
Days to Maturity
Seed Type
Disease Resistance
Leaf Type
Foliage Color
Bloom Characteristics
Water Requirements
Where to Grow
Other details
Propagation Methods
Soil pH requirements
Patent Information
Plant Size (check one)
Growing Habit
Growth Rate
Leaf Shape
Leaf Appearance
Degree to which the appearance is present
Leaf Texture (top)
Leaf Texture (bottom)
Leaf Color
Color of Leaf Margin
Leaf Substance
Number of Vein Pairs
Appearance of Margin
Margin Width
Flower Shape
Flower Fragrance
Does it set seed?
Flower Size
Flower Type
Blooming Habit
Foliage Habit
Color Patterns
Awards (if applicable)
Tall Bearded (TB)
Seed Type
Growth Habit
Days to Maturity
Awards (if applicable)
Bloom Shape
Other Details
Pruning Instructions
Kernel Color
Flower Shape
Flower Habit
Bloom Size
Color Pattern
Bloom Shape
Pruning Groups
Bloom Diameter
Heat (Pungency)
Fruit Shape
Fruit Size
Fruit Color
Disease Resistance
Seed Type
Flower Size
Size/Type
Flower Characteristics
Leaf Shape/Type
Leaf Texture
Leaf Color
Midseason (M)
Propagation
Honorable Mention
Award of Merit
Walther Cup
Pollination
Bearing Habit
Rootstock Vigor
Disease Resistance
Fruit Usage
Flowers are fragrant
Classification
Average Water Needs; Water regularly; do not overwater
Regional

This plant is said to grow outdoors in the following regions:

Tucson, Arizona

Citrus, California

Emeryville, California

Gainesville, Georgia

Eastport, Idaho

Hebron, Kentucky

Durham, Maine

Gladwin, Michigan

Marquette, Michigan

Robertsville, Missouri

Omaha, Nebraska

South Sioux City, Nebraska

Las Vegas, Nevada

Los Alamos, New Mexico

Lawton, Oklahoma

Gold Hill, Oregon

Greeneville, Tennessee

Pasco, Washington

Hustisford, Wisconsin

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Featured Videos

Gardener's Notes:

5
positives
2
neutrals
0
negative
Sort By:
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M
Mill Valley, CA | May 2018 | positive

Planted this 6 years ago, fell in love with it. The color is stunning. Landscaper removed all my iris into a bucket after 1st bloom and...Read More

L
stony mountain, MB (Zone 3a) | March 2012 | positive

planted this iris slightly shaded 2010 zone 3a

one word to describe ? stunning

i'm so careful with this pl...Read More

A
Burnaby, BC (Zone 7b) | July 2010 | positive

Huge, fragrant, and black. This is the only iris I would classify as black. The beard is fuzzy-purple which, at first, makes you think ...Read More

P
Hustisford, WI (Zone 5a) | June 2010 | positive

This plant bloomed the first year, with gorgeous deep purple, almost black flowers. everyone that saw it raved about it. It is tall, bloo...Read More

J
J
Belfield, ND (Zone 4a) | March 2006 | neutral

Awards: American Iris Society Honorable Mention 2000; Walther Cup 2000; Award of Merit 2002

D
D
Stanford, CA (Zone 9b) | March 2005 | neutral

(Keppel, 97) Mid season bloomer. 36" Fragrant
"Fine black self with grape beards. Exceptional grower with excellent branching and ...Read More

M
Manhattan, KS | June 2003 | positive

This iris has done very well for me. It blooms late in zone 5. It is probably the closest to a black iris that I have seen. Very velvet...Read More

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