perennial

Siberian Iris 'Perry's Blue'

Iris sibirica 'Perry'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

24 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Medium to High

Humidity

Average

Lifespan

Perennial

Native To

Siberia and Central Asia

Toxicity

All parts may cause discomfort if ingested.

The Story

Plant Bio

Siberian irises are clump-forming perennials with narrow, grass-like leaves. They produce elegant, beardless flowers on slender stems above the foliage in late spring and early summer. They are valued for their hardiness and graceful appearance. An heirloom cultivar dating back to 1912, 'Perry's Blue' is celebrated for its classic, clear, sky-blue flowers with delicate veining on the falls. It is a reliable and vigorous grower, forming substantial clumps over time.

Bloom Period:

EarlyLate

Uses & Benefits:

The Iris sibirica Perry offers striking blue flowers and elegant foliage, enhancing garden aesthetics.

Its hardy nature makes it low-maintenance, reducing gardener effort.

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

Marketplace

Where to Buy

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Planting

How to Grow

Choose a well-drained, sunny location for planting.
Tuck rhizomes 2-3 inches deep into the soil in early spring.
Mist the soil lightly to keep it moist but not waterlogged.
Allow 12-16 inches of space between each plant for growth.
Water regularly during the first growing season to establish roots.
Divide clumps every 3-4 years in late summer for optimal vigor.

Pro Tip

Plant in well-drained soil with full sun for best blooms.

Keep It Thriving

Care Guide

Do

Water during dry spells to keep soil moist 🌱
Apply a balanced fertilizer in early spring
Remove dead foliage to encourage healthy growth

Don't

Avoid waterlogging which can cause rhizome rot ❌
Don’t plant too deep—keep rhizomes near soil surface
Refrain from over-fertilizing to prevent lush foliage over flowers

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Perennial border with silvery foliageRock garden accent with vibrant blue bloomsFragrant grouping in cottage gardens

Companion Plants

Daylilies Sedum Allium Lavender Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Siberian Iris 'Perry's Blue' questions

What zones can Siberian Iris 'Perry's Blue' grow in?

Siberian Iris 'Perry's Blue' 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 Siberian Iris 'Perry's Blue' deer resistant?

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

When does Siberian Iris 'Perry's Blue' bloom?

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

Does Siberian Iris 'Perry's Blue' need full sun?

Siberian Iris 'Perry's Blue' does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.