Tufted Evening Primrose (Oenothera cespitosa)

Also known as: Fragrant Evening Primrose, Cespitose Evening-Primrose

Tufted Evening Primrose (Oenothera cespitosa) is a perennial that typically blooms from late spring to early fall. Its large, white flowers, about 4 inches wide, turn pink as they age and feature prominent yellow stamens. These fragrant blooms open in the evening and close by the next morning.

For optimal growth, plant in:
- **Sunlight:** Full sun
- **Soil:** Well-drained, sandy or rocky soils
- **Water:** Minimal; drought-tolerant once established

These conditions emulate its native environment, promoting healthy growth and prolific blooming.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Tufted Evening Primrose

Lifespan

Perennial

Plant Type

Herb

Plant Height

15 cm to 30 cm

Spread

15 cm to 30 cm

Leaf Color

Green

Flower Size

2.5 cm to 5 cm

Flower Color

White

Images of Tufted Evening Primrose

Quickly Identify Tufted Evening Primrose

This species can be identified by its large, fragrant white flowers that turn pink as they age. The leaves are lance-shaped, with a somewhat wavy margin, and can form a basal rosette.

Scientific Classification of Tufted Evening Primrose

Phylum

Vascular plants

Class

Dicotyledons

Order

Myrtales

Family

Evening primrose

Genus

Evening Primrose

Species

Tufted Evening Primrose

Planting and Growing of Tufted Evening Primrose

Care Difficulty

Easy

Watering Schedule

Every day

Sunlight Requirements

Full sun

Sunshine Duration

6-12 hours

Ideal Temperature

60-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Leaves, Branches

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Tufted Evening Primrose?

For Oenothera cespitosa, strive to mimic its natural desert environment by providing about 250ml of water per session. This should be enough to moisten the topsoil without drowning the roots. Water until a slight drainage occurs to ensure deep root penetration.

What are the symptoms of an underwatered Tufted Evening Primrose? ›

What should I do if my Tufted Evening Primrose is not getting enough water? ›

What are the symptoms of an overwatered Tufted Evening Primrose? ›

How to save an overwatered Tufted Evening Primrose? ›

What Are the Sunlight Requirements for Tufted Evening Primrose?

Sunlight Requirements: Full sun

Duration of light: 6-8 hours

For optimal health, Oenothera cespitosa thrives in full sun, ideally getting six to eight hours of sunlight, promoting robust growth and prolific flowering when energy absorption is maximized.

How to achieve ideal lighting? ›

Specific steps to ensure light adequacy? ›

Benefits of receiving ideal light? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Tufted Evening Primrose?

Ideal Temperature: 60 ~ 75℉

Oenothera cespitosa thrives best in environments where the temperature ranges between 60°F and 75°F. These temperatures allow for optimal metabolic activity and growth, providing the plant with sufficient warmth without causing heat stress.

What Soil is Best for Tufted Evening Primrose?

Soil type: Sandy soil, Loam, Sandy loam, Calcareous soil

Soil PH: 6.5 ~ 7.5

Oenothera cespitosa prefers well-drained soil to prevent root rot. Ensuring proper drainage helps maintain healthy roots and promotes optimal growth, making sandy or loamy soils a good choice for this plant. While Oenothera cespitosa is not overly demanding in terms of nutrients, a slightly enriched loam will provide the necessary elements for vibrant blooms. Organic matter can be added to improve the soil's nutrient profile, supporting healthy development. The plant thrives in soils that retain some moisture without becoming waterlogged. Sandy loams provide an ideal balance, holding enough moisture for the plant’s needs while allowing excess water to drain away.

How to Fertilize Tufted Evening Primrose?

Fertilizer type: Balanced

For Oenothera cespitosa, it’s crucial to use the right amount of fertilizer to avoid complications. When applying liquid fertilizer, use a diluted solution at half the strength recommended for general flowering plants. For solid slow-release fertilizers, 1 tablespoon per plant distributed evenly around the base should suffice.

How to Prune Tufted Evening Primrose?

Pruning Time: Spring, Autumn

Begin by removing any dead or damaged leaves to prevent disease and allow the plant to direct energy towards healthy growth. Gently cut close to the base without damaging the main stem ensuring clean cuts for faster healing. Trim back overgrown or sprawling areas to maintain a neat appearance. Cut above a leaf node to encourage branching and fuller growth, promoting a more structured plant form, perfect for a well-kept garden setting. For optimal blooming, lightly shape the plant by selectively trimming to open up the center and increase airflow. This will reduce the risk of mold and boost flower production for a more abundant blooming season. More About Pruning Techniques→

How to Propagate Tufted Evening Primrose plant?

Propagate Time: Spring, Late spring, Early summer

Start by filling a seed tray with a quality seed starting mix. Sow the seeds evenly on the surface, lightly pressing them into the soil, which ensures good seed-to-soil contact essential for germination.

Maintain consistent moisture levels by lightly watering the seeds or using a spray bottle. While keeping the seeds moist, avoid waterlogging, as this can lead to seed rot and prevent successful germination.

Once seedlings have grown a few true leaves, prepare them for outdoor conditions by gradually increasing their exposure to sunlight and wind. This process, known as hardening off, helps them acclimate and strengthens their growth.

More About Propagating Techniques→

How to Repot Tufted Evening Primrose plant?

Repotting frequency: Every 1-2 years

Watch for crowded roots peeking from drainage holes or a plant that isn’t thriving despite proper care. Spring to early summer is ideal, as the plant is entering its growth phase.

Choose a pot 1-2 inches larger in diameter with adequate drainage to allow room for growth and to prevent root rot. A heavy pot is beneficial because it anchors the plant despite risks of toppling.

Opt for a sandy, well-draining soil mix simulating its natural arid habitats. This mix provides excellent aeration and reduces the risk of overwatering while supporting healthy growth.