Oenothera, Showy Evening Primrose, Showy Pink Primrose 'Siskiyou'

Oenotheraspeciosa

Family
Onagraceae (on-uh-GRAY-see-ee)
Genus
Oenothera (ee-no-THEE-ruh)
Species
speciosa (spee-see-OH-suh)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Height
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
Spacing
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
Hardiness
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)
Bloom Color
Pale Pink
Pink
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Other Details
Category
Groundcovers
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Grow outdoors year-round in hardiness zone
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Flowers are fragrant
Bloom Size
Other details
May be a noxious weed or invasive
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 the rootball
From seed; direct sow outdoors in fall
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

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

Alexandria, Alabama

Wetumpka, Alabama

Goodyear, Arizona

Phoenix, Arizona

Sun City West, Arizona

Castro Valley, California

Hanford, California

Knights Landing, California

Los Angeles, California

Mission Viejo, California

NORTH FORK, California

Newport Beach, California

San Leandro, California

Woodland, California

Fountain, Florida

Jacksonville, Florida

Atlanta, Georgia

Stone Mountain, Georgia

Boise, Idaho

Canton, Illinois

Elizabethtown, Indiana

Fishers, Indiana

Des Moines, Iowa

Urbandale, Iowa

Lexington, Kentucky

Glen Burnie, Maryland

Potomac, Maryland

Rockland, Massachusetts

Royal Oak, Michigan

Saginaw, Michigan

Lake Park, Minnesota

Kansas City, Missouri

Saint Peters, Missouri

Wentzville, Missouri

Auburn, New Hampshire

Franklin Park, New Jersey

Lanoka Harbor, New Jersey

Albuquerque, New Mexico

Las Cruces, New Mexico

Santa Fe, New Mexico

Chapel Hill, North Carolina

Fuquay Varina, North Carolina

Raleigh, North Carolina

Cincinnati, Ohio

Cleveland, Ohio

Sheffield Lake, Ohio

Hulbert, Oklahoma

Clairton, Pennsylvania

Lehigh Valley, Pennsylvania

Mechanicsburg, Pennsylvania

Nashville, Tennessee

Arlington, Texas

Cypress, Texas

Houston, Texas

Mc Kinney, Texas

New Caney, Texas

Spring Branch, Texas

Saint George, Utah

Salt Lake City, Utah

Arlington, Virginia

Forest, Virginia

Mc Lean, Virginia

Mechanicsville, Virginia

Petersburg, Virginia

West Richland, Washington

Parkersburg, West Virginia

Waterloo, Wisconsin

show all

Featured Videos

Gardener's Notes:

9
positives
6
neutrals
8
negatives
Sort By:
Sort By:
K
| November 2020 | neutral

Found this plant in a nursery for 4 bucks, separated it into many, such a steal! Beautiful flowers that bloom all season, deer haven’t ...Read More

C
Rockland, MA (Zone 6b) | September 2020 | positive

I love Siskiyou! She's very wispy and cottagey looking. She will self-seed which I don't mind at all. I will have to transplant her in an...Read More

I
| November 2012 | positive

I start plant this flower last year. I was given the seeds by a senior in USA. I am living in Bekasi, Indonesia which the temperature is ...Read More

L
Albuquerque, NM | April 2012 | negative

This thing is invading after less than a year. I bought it from Plants of the Southwest in NM and really wish somebody had told me about...Read More

H
Cypress, TX (Zone 9a) | March 2012 | positive

While trying to make flower beds look nice in our newly built home, I used to pick these plants out every Feb, cursing at the "weeds" tha...Read More

T
T
Jacksonville, FL (Zone 9a) | May 2011 | neutral

This is a wonderful wildflower. Along roadways, etc. In my garden it has spread very quickly and it has helped to shade out weeds, like a...Read More

N
Bartlesville, OK | May 2011 | neutral

Just bought showy pink primrose, potted it. I've had it about a week & it has quit blooming. Wonder if it could be because we have only...Read More

I
Los Altos, CA | April 2011 | negative

AVOID this plant unless you want it everywhere and choking out your other plants. When our yard was re-landscaped, this plant was put her...Read More

C
Fuquay-Varina, NC (Zone 7b) | March 2011 | negative

Pretty flowers. This plant is a monster. It will take over the whole garden, that means everywhere.
It's impossible to get rid of....Read More

S
S
Lake Park, MN | August 2010 | neutral

Holy invasive! I planted this in rich soil, thinking it would die in my cold MN climate, but it has spread like crazy. The blooms are b...Read More

M
M
Los Angeles, CA | August 2010 | neutral

I bought this plant 3 weeks ago and planted it in full sun. Added manure, put weed repellent plastic around it and covered the plastic w...Read More

S
North Fork, CA (Zone 7b) | July 2010 | negative

Love this plant, but not in my garden! I did this to myself, too. At one point the stems are bare and scraggley and that's what I don't l...Read More

A
Cottage Grove, OR | June 2009 | positive

I LOVE this plant. I first planted it in San Miguel, Calif. where the temperatures were anywhere from 8 degrees to 120 degrees and VERY a...Read More

C
Macon, GA | November 2008 | negative

I hate this plant! I hate this plant! If it were 4 inches tall it might be attractive, but the long stem is ugly. I've had an ongoing ...Read More

A
A
Sierra Vista, AZ (Zone 8a) | March 2008 | negative

Quite invasive. Will take over and choke out other plants if planted in fertile and well watered flower bed. The roots of these plants ar...Read More

J
Forest, VA | June 2007 | neutral

I just planted 15 of these plants. Some of them are not doing well at all and all have stopped blooming. We have had copious rain here ...Read More

C
Crossville, TN (Zone 7a) | January 2005 | positive

If you kill this plant, give up gardening.
A really forgiving and beautiful flower. Mine are well behaved after being transplant...Read More

H
H
Castro Valley, CA (Zone 9a) | September 2004 | negative

Originally I said I loved it, that was until it started growing everywhere, I've been unable to iradicate it, and the next time I see som...Read More

N
N
Petersburg, VA (Zone 7a) | September 2004 | negative

Planted this spring,2004. Very invasive. Whether this is good or bad, have yet to decide. Planted among a variety of other plants along a...Read More

I
| April 2004 | positive

Starting from two one-gallon plants two years ago, the Mexican Primroses we planted in our backyard has spread to cover a dry, sloping hi...Read More

F
Josephine, Arlington, TX (Zone 8a) | February 2004 | positive

This lovely Primrose also known as Buttercup is one of the most abundant wildflowers in Texas. I love this plant, it starts blooming earl...Read More

J
J
Clairton, PA | May 2003 | positive

This is a plant that is invasive but easy to control. It is a beautiful ground cover. Grows very quickly and spreads.
Flowers are ...Read More

D
D
(Zone 5b) | July 2002 | positive

I love how this plant tolerates heat and drought. It is not invasive for me, perhaps because of being in heavily-mulched beds. My variety...Read More

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