Oenothera perennis (Fr: onagre vivace | En: Small sundrops)

Small Sundrops

Oenothera perennis
Alternative names: Perennial Evening Primrose (not to be confused with night-flowering species)
French: Onagre vivace

Small Sundrops is a native, day-blooming wildflower closely related to evening primroses. Unlike its larger, night-flowering cousins, this low-growing perennial produces bright yellow, cup-shaped flowers that open in full daylight, offering a cheerful burst of colour from late spring into early summer.

This species is well suited to meadows, sandy or rocky soils, and roadside habitats throughout the Ottawa Valley. Once established, it is drought tolerant and thrives in well-drained, sunny sites, although it will perform best with moderately moist soils. In partial shade, it may grow but produce fewer blooms.

Oenothera perennis is a low-maintenance, long-flowering plant that fits beautifully in rock gardens, pollinator beds, and naturalized plantings. Its adaptability and vibrant display make it a strong candidate for ecological or decorative gardens.

Height: 15–30 cm
Bloom time: Late spring to early summer
Light: Full sun (6+ hours); fewer flowers in part shade
Moisture: Drought-tolerant; prefers moderate moisture
Soil: Well-drained, sandy to loamy; slightly acidic to neutral pH
Habitat: Meadows, sandy slopes, roadsides, rock outcrops
Ecological benefits: Supports pollinators, resilient groundcover
Edible: Not commonly consumed