Oenothera rosea

Evening Primrose

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Oenothera rosea is a herbaceous perennial native to North America, renowned for its large yellow flowers that open at dusk. It requires full sun and well-drained soil, thriving in garden beds or containers.
yard Outdoor plants wb_sunny Sun pets Not pet-safe
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Plant Details

Common Name Evening Primrose
Family Oenotheraceae
Genus Oenothera
Species Rosea
Origin North America
Blooming Large yellow flowers that open at dusk, lasting one night.
Leaf Color Grey-green to dark green
Sunlight Sun
Category Outdoor plants
Pet Friendly close No
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Care & Maintenance

terrain
Soil

Well-drained, average to poor soil; tolerates drought once established

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Watering

Regular watering until established, then drought tolerant. Avoid waterlogging.

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Sunlight & Care

Full sun (6+ hours daily); essential for flowering and plant vigor

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Fertilization

Low nutrient needs; apply compost at planting time, avoid excess nitrogen

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Pruning

Deadhead spent flowers to encourage blooming; cut back after first frost

Pest Control Aphid Caterpillar Slug Snail

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 5 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 10 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
5° – 95°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
20% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
10000 – 35000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
2500 – 4500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
10% – 45%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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