perennial

Evening Primrose Silver Blade

Oenothera macrocarpa 'Silver Blade'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

8 inches

Width

18 inches

Light

Full Sun

Zones

4, 5, 6, 7, 8

Water

Low

Humidity

Average

Lifespan

Perennial

Native To

North America

Toxicity

Non-toxic

The Story

Plant Bio

Oenothera macrocarpa, commonly known as the Mississippi evening primrose, is a perennial with slender, upright stems and narrow, silvery-green foliage. It produces large, yellow, cup-shaped flowers that bloom in the evening. This cultivar, Silver Blade, features uniquely silvery, linear leaves that add ornamental value and contrast, along with its reliable, vibrant yellow flowers that open in the evening.

Bloom Period:

EarlyLate

Uses & Benefits:

Bright yellow flowers and silver foliage add visual interest and contrast in gardens.

Drought-tolerant, requiring minimal watering once established.

Provides nectar for pollinators and supports local biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds into well-draining soil in spring
Mist cuttings lightly to maintain moisture
Water regularly until established, about 6 weeks
Place in full sun for best flowering
Fertilize with a balanced, low-nitrogen fertilizer in spring
Mulch to retain soil moisture and suppress weeds

Pro Tip

Ensure excellent drainage to prevent root rot and encourage healthy growth.

Keep It Thriving

Care Guide

Do

Water deeply during dry spells 🌱
Deadhead spent flowers to encourage more blooms
Apply a slow-release fertilizer in spring
Mulch around plants to conserve moisture

Don't

Avoid overwatering, which can cause root rot ❌
Don’t fertilize with high nitrogen fertilizers
Refrain from heavy pruning in late fall
Do not plant in poorly drained soils

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bright border with silver foliageWildflower meadow accentDrought-tolerant hillside plant

Companion Plants

Lavender Salvia Coreopsis Yarrow Russian sage

Multiply

Propagation Methods

Good to Know

Common Questions

Evening Primrose Silver Blade questions

What zones can Evening Primrose Silver Blade grow in?

Evening Primrose Silver Blade is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Evening Primrose Silver Blade deer resistant?

Not reliably. Deer may browse Evening Primrose Silver Blade, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Evening Primrose Silver Blade bloom?

Evening Primrose Silver Blade typically blooms in early summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Evening Primrose Silver Blade need full sun?

Evening Primrose Silver Blade does best in full sun (6+ hours).

Is Evening Primrose Silver Blade drought tolerant?

Yes — once established (usually after the first full season), Evening Primrose Silver Blade handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.