Evening primrose

Oenothera macrocarpa

Oenothera macrocarpa is a perennial herbaceous plant native primarily to the central and eastern regions of North America. The following are the main characteristics and related information regarding this plant.
 - Growth Characteristics:
- Oenothera macrocarpa grows to a height of 20–30 cm, with multiple stems emerging from the roots and spreading flat.
- Flowers bloom mainly from summer to early autumn and are characterized by large yellow blossoms.
- It prefers environments with plenty of sunlight but can tolerate partial shade.
- It adapts well to dry conditions and thrives in well-drained soil.
 - Propagation Methods:
- Seed propagation: Harvest seeds in the autumn, refrigerate them during the winter, and sow them outdoors in early spring.
- Division: Large clumps can be divided and propagated in spring or early autumn.
 - Cultivation Methods:
- Plant in a sunny location and ensure the soil is well-drained. - When first planting, water thoroughly to help the roots establish themselves. Afterward, it thrives even in dry conditions.
- Fertilizer is not necessary, and growth may actually be inhibited in overly fertile soil.
 - Uses in the Garden:
- The golden flowers are well-suited for the front of flower beds or rock gardens.
- Due to its spreading growth habit, it can also be used as a ground cover plant and is suitable for low borders or slopes.
 - Major Pests and Control Methods:
- It is generally resistant to pests and diseases and does not require special care.
- Rarely, aphids or leaf blight may occur; these can be managed by treating with soapy water or removing diseased leaves.
- Ensure good ventilation and drainage to prevent fungal diseases.

Evening Primrose (Macrocarpa) is relatively easy to care for and is an attractive plant that allows you to enjoy its colorful flowers in the garden.

Plant Type
Plant Family	Onagraceae
Height	15~30cm
Spread	30~60cm
Colors	yellow
Bloom Period	May to August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-30°C

Pink evening primrose
Oenothera speciosa

Pink evening primrose 'Siskiyu'
Oenothera speciosa 'Siskiyou'