1 named cultivar

‘Celebration Song’Celebration Song Iris

perennialN. America Native

Long-tubed Iris

Iris tenuissima

The Story

Plant Bio

A rhizomatous perennial native to the western U.S., forming clumps of slender, grass-like leaves with delicate, intricately patterned flowers.

This species is notable for its compact growth and ability to thrive in dry, woodland conditions once established.

Uses & Benefits:

Iris tenuissima offers delicate, fragrant flowers that add elegance to borders and rock gardens.

Its drought tolerance makes it suitable for xeriscaping and low-water gardens.

Provides nectar for pollinators like bees and butterflies, supporting local biodiversity.

Essentials

At a Glance

Plant Type

Perennial

Height

12 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

7, 8, 9

Water

Low to moderate; drought-tolerant once established

Humidity

Prefers dry to moderate humidity

Lifespan

Perennial

Native To

Western North America (California, Oregon)

Toxicity

All parts may cause discomfort if ingested; rhizomes are particularly toxic.

Planting

How to Grow

Tuck seeds into well-draining soil in early spring.
Water regularly to keep soil moist but not waterlogged.
Mist cuttings in a humid environment for 4-6 weeks.
Transplant seedlings when they are established, typically after one growing season.
Divide mature clumps every 3-4 years in early spring or fall.
Mulch around plants to retain moisture and suppress weeds.

Pro Tip

Ensure good drainage to prevent root rot and promote healthy growth.

Keep It Thriving

Care Guide

Do

Provide full sun for optimal flowering 🌞
Water consistently during the growing season 💧
Apply a balanced fertilizer in early spring
Divide clumps every 3-4 years to rejuvenate
Remove spent flowers to encourage new blooms

Don't

Avoid overwatering, as Iris tenuissima dislikes soggy soil ❌
Do not prune in late fall or winter ❌
Avoid planting in heavy clay soil without amendments ❌
Refrain from fertilizing with high nitrogen in late season ❌

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Silver-foliaged borderDelicate perennial accentFragrant garden edge

Companion Plants

Lavender Salvia Echinacea CoreopsisYarrow

Multiply

Propagation Methods

Good to Know

Common Questions

Long-tubed Iris questions

What zones can Long-tubed Iris grow in?

Long-tubed Iris is hardy in USDA Zones 7–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Long-tubed Iris deer resistant?

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

When does Long-tubed Iris bloom?

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

Does Long-tubed Iris need full sun?

Long-tubed Iris does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Long-tubed Iris drought tolerant?

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