Oenothera Species, Berlandier's Sundrops, Evening Primrose, Square-Bud Primrose

Oenotheraberlandieri subsp. berlandieri

Family
Onagraceae (on-uh-GRAY-see-ee)
Genus
Oenothera (ee-no-THEE-ruh)
Synonym
Calylophus drummondianus
Sun Exposure
Full Sun
Foliage
Deciduous
Height
12-18 in. (30-45 cm)
Spacing
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
Hardiness
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)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
Bloom Color
Bright Yellow
Bloom Time
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall
Other Details
Category
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
Patent Information
Propagation Methods
From seed; direct sow outdoors in fall
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Regional

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

Chandler, Arizona

Green Valley, Arizona

Atascadero, California

Benicia, California

Chico, California

Red Bluff, California

San Francisco, California

San Leandro, California

Boise, Idaho

Austin, Texas

Crawford, Texas

Fort Worth, Texas

Georgetown, Texas

Helotes, Texas

Rowlett, Texas

San Antonio, Texas(2 reports)

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Gardener's Notes:

4
positives
2
neutrals
0
negative
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D
| August 2018 | positive

Recently moved to a city that has triple digit weather in the summer and can drop as low as 25 F in the winter. All the potted plants th...Read More

C
Austin, TX | April 2017 | neutral

Seems indistinguishable from the stemless primrose...?

...Read More

F
Josephine, Arlington, TX (Zone 8a) | March 2007 | neutral

Drummond’s Sundrops, Square-Bud Primrose, Compact Gold Calylophus Calylophus drummondianus is native to Texas ans other States.

L
NE Medina Co., TX (Zone 8a) | January 2006 | positive

The Squarebud Primrose is a native wildflower in Texas. It grows here in my area along the roadsides, very pretty when blooming. I have t...Read More

K
K
Red Bluff, CA | May 2004 | positive

Red Bluff, CA

I am growing this plant in a raised bed, in full sun, which receives water everyday. I planted two plants l...Read More

H
H
San Antonio, TX (Zone 8b) | September 2003 | positive

San Antonio, TX
A native New Mexico and Texas plant, Drummond’s sundrops is a spreading ground cover closely related to the even...Read More

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