Species

Iris x hollandicaDutch Iris

3 other cultivars

bulb corm tuber

Dutch Iris Casablanca

Iris x hollandica 'Casablanca'

The Story

Plant Bio

Iris hollandica 'Casablanca' is known for its striking white flowers and elegant appearance, making it a popular choice for border gardens and formal settings.

This cultivar features large, luminous white blooms with a hint of yellow in the center, standing tall on sturdy stems.

Uses & Benefits:

The Casablanca cultivar offers large, fragrant white flowers that add elegance to borders and cut flower arrangements.

Provides early-season color and attracts pollinators, supporting ecological garden health.

Supports local bees and butterflies, enhancing biodiversity.

SpeciesIris x hollandicaDutch Iris

Essentials

At a Glance

Plant Type

Bulb Corm Tuber

Height

24 inches

Width

6 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

Europe

Toxicity

Toxic if ingested

Bloom period

Mid-spring – Late spring

In flower about 2 months of the year

Planting

How to Grow

Tuck rhizomes 4 inches deep into well-draining soil with organic matter.
Water regularly to keep soil moist but not soggy during active growth.
Mist foliage during dry spells to prevent leaf scorch and promote healthy growth.
Divide clumps every 3-4 years in late summer to maintain vigor.
Stake tall varieties if needed to support flowering stems.
Mulch lightly to suppress weeds and conserve moisture during spring and fall.

Pro Tip

Plant in full sun for best blooms and ensure excellent drainage to prevent rot.

Keep It Thriving

Care Guide

Do

Water deeply during dry periods 💧
Apply a balanced fertilizer in early spring 🌱
Remove spent flowers to encourage reblooming
Mulch annually to retain soil moisture

Don't

Avoid overwatering to prevent root rot ❌
Do not plant in heavy, poorly-drained soil
Refrain from disturbing bulbs during flowering
Avoid using chemical herbicides near the plants

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Elegant perennial borderColorful rock garden accentFragrant cut flower display

Companion Plants

Daylilies SedumAlliums Peonies Lavender

Multiply

Propagation Methods

Good to Know

Common Questions

Dutch Iris Casablanca questions

What zones can Dutch Iris Casablanca grow in?

Dutch Iris Casablanca is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Dutch Iris Casablanca deer resistant?

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

When does Dutch Iris Casablanca bloom?

Dutch Iris Casablanca typically blooms in mid-spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Dutch Iris Casablanca need full sun?

Dutch Iris Casablanca does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Dutch Iris Casablanca drought tolerant?

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