Oenothera Species, Whitest Evening-Primrose
Oenotheraalbicaulis

Family: Onagraceae (on-uh-GRAY-see-ee)
Genus: Oenothera (ee-no-THEE-ruh)
Species: albicaulis (al-bih-KAW-liss)

Synonym:Oenothera albicaulis

Category
Alpines and Rock Gardens
Annuals

Water Requirements
Drought-tolerant; suitable for xeriscaping

Sun Exposure
Full Sun
Sun to Partial Shade

Foliage
Herbaceous

Foliage Color

Height
under 6 in. (15 cm)
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)

Spacing
3-6 in. (7-15 cm)

Hardiness
Not Applicable

Where to Grow

Danger

Bloom Color
Pale Pink
White/Near White

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

Bloom Size

Bloom Time
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall

Other details

Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
8.6 to 9.0 (strongly alkaline)

Patent Information
Non-patented

Propagation Methods
From seed; direct sow outdoors in fall
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting
Bag seedheads to capture ripening seed
Collect seedhead/pod when flowers fade; allow to dry
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds