perennial

Unicorn Corkscrew Rush

Juncus effusus 'Unicorn'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

18 inches

Width

18 inches

Light

Full Sun, Partial Sun, Shade

Zones

4, 5, 6, 7, 8, 9

Water

Requires wet or saturated soil

Humidity

Prefers moist environments

Lifespan

Perennial

Native To

Widespread globally

Toxicity

Non-toxic

The Story

Plant Bio

Juncus effusus 'Unicorn' is a clumping perennial rush with slender, cylindrical stems that create a soft, grass-like appearance, and it produces dense clusters of small, brownish flowers on upright stalks. This cultivar is distinguished by its striking, upright, spirally twisted stems that add a whimsical and architectural element to water gardens and moist landscapes.

Uses & Benefits:

Provides lush, green vertical accents in water gardens, attracting insects and enhancing pond aesthetics.

Helps stabilize pond banks and filter water with its dense root system.

Supports aquatic insects and provides habitat for pond wildlife.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Select a water-saturated site with full sun or partial shade
Plant rhizomes 1-2 inches deep in moist soil or shallow water
Water regularly to keep soil consistently moist for 6 weeks after planting
Mulch around the base to retain moisture and suppress weeds
Divide clumps every 2-3 years in early spring to promote growth
Tuck in new rhizomes during the growing season for propagation

Pro Tip

Ensure consistent moisture for healthy growth and vibrant appearance

Keep It Thriving

Care Guide

Do

Keep soil moist, especially during dry spells 🌱
Divide clumps every 2-3 years to prevent overcrowding
Mulch to retain soil moisture and control weeds

Don't

Avoid letting soil dry out completely ❌
Don’t plant in poorly drained areas, which can cause root rot
Refrain from over-fertilizing, as it may promote excessive growth

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Water-edge borderPond marginWet meadow

Companion Plants

Pickerelweed Cattails Lobelia

Multiply

Propagation Methods

Good to Know

Common Questions

Unicorn Corkscrew Rush questions

What zones can Unicorn Corkscrew Rush grow in?

Unicorn Corkscrew Rush is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Unicorn Corkscrew Rush deer resistant?

Yes — Unicorn Corkscrew Rush is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Unicorn Corkscrew Rush bloom?

Unicorn Corkscrew Rush typically blooms in late spring to summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Unicorn Corkscrew Rush need full sun?

Unicorn Corkscrew Rush does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.