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Oenothera speciosa
Oenothera speciosa
Oenothera speciosa
Oenothera speciosa

Oenothera speciosa

TAXONOMY

FamilyOnagraceae
GenusOenothera
Zone5

ABOUT

Oenothera speciosa, commonly known as pink evening primrose, is a perennial plant native to the central United States and Mexico. It is known for its showy pink flowers that bloom in the evening and close by midday. The plant spreads through rhizomes and can form dense colonies. It prefers temperate climates and can tolerate a range of soil types.

ALSO KNOWN AS

Pink Evening Primrose
Hartmannia speciosa
Oenothera delessertiana
Oenothera hirsuta
Oenothera obtusifolia
Oenothera shimekii
Oenothera spachii
Oenothera speciosa f. subintegrifolia
Oenothera speciosa var. childsii
Oenothera speciosa var. serrulatiformis
Oenothera speciosa var. speciosa
Oenothera tetraptera var. childsii
Xylopleurum drummondii
Xylopleurum hirsutum
Xylopleurum nuttallii
Xylopleurum obtusifolium
Xylopleurum speciosum

OVERVIEW

WaterDry
SoilLoamy
LightDirect Bright (6 Hours)
Temperature20° C
Humidity50%
Dormancy3 Months
pH6.5
Pressure1,013 mbar

DETAILS

Care Instructions
Pink evening primrose is relatively easy to care for. It prefers full sun and moderate temperatures. Water the plant when the soil is dry, but avoid overwatering. It can tolerate moderate humidity levels. This plant is hardy and can withstand a range of conditions, making it suitable for outdoor gardens.
Soil
Oenothera speciosa prefers well-draining loamy soil. It can tolerate poor soil conditions but thrives best in moderately fertile soil. Ensure the soil dries out between waterings to prevent root rot.
Fertilizer
Use a balanced fertilizer with a nutrient composition of 5-10-10. Fertilize the plant in the spring and mid-summer to promote healthy growth and flowering. Avoid over-fertilizing as it can lead to excessive foliage growth at the expense of flowers.
Repotting
Repotting is generally not necessary for this plant as it is typically grown outdoors. However, if grown in containers, repot every 2-3 years to refresh the soil and provide more space for root growth. Choose a slightly larger pot with good drainage.
Propagation
Oenothera speciosa can be propagated through division or seeds. Divide the rhizomes in early spring or fall. Seeds can be sown directly in the garden in the spring. Ensure the soil is well-draining and keep it moist until the seeds germinate.
Pruning
Pruning is beneficial for maintaining the plant's shape and encouraging more blooms. Cut back the stems after flowering to promote new growth. Remove any dead or damaged foliage to keep the plant healthy.
Toxicity
Oenothera speciosa is not toxic to pets or humans. It is safe to grow in gardens where children and pets are present.
Additional
Pink evening primrose is a versatile plant that can be used in borders, rock gardens, and wildflower meadows. It attracts pollinators such as bees and butterflies, making it a great addition to any garden focused on supporting local wildlife.
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