Species

Iris sibiricaSiberian Iris

26 other cultivars

perennial

Siberian Iris Roaring Jelly

Iris sibirica 'Roaring Jelly'

The Story

Plant Bio

Iris sibirica 'Roaring Jelly' is a hardy perennial with elegant, grass-like foliage and vibrant, ruffled violet-blue flowers that bloom in late spring to early summer, creating a striking display.

This cultivar is distinguished by its intensely bright, almost electric violet blooms and its robust, clump-forming habit that enhances garden borders and cut flower arrangements.

Uses & Benefits:

Striking blue flowers add vibrant color to perennial borders and rock gardens, attracting insects and enhancing visual appeal.

Drought-tolerant and low-maintenance, ideal for low-water gardens and erosion control.

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

SpeciesIris sibiricaSiberian Iris

Essentials

At a Glance

Plant Type

Perennial

Height

30"

Width

18"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate, drought-tolerant once established

Humidity

Prefers moderate humidity

Lifespan

Many years with proper division

Native To

Siberia and East Asia

Toxicity

Toxic if ingested

Bloom period

Late spring – Early summer

In flower about 2 months of the year

Planting

How to Grow

Tuck rhizomes 2 inches deep in well-drained soil
Water regularly during first growing season
Divide every 3-4 years in early spring or late summer
Mulch to retain moisture and suppress weeds
Place in full sun for best blooms
Fertilize with a balanced fertilizer in early spring

Pro Tip

Plant in well-drained soil and full sun for vibrant blooms.

Keep It Thriving

Care Guide

Do

Water during dry spells 🌱
Divide every 3-4 years to promote healthy growth
Mulch to conserve moisture and control weeds
Fertilize annually in early spring

Don't

Avoid waterlogging, which can cause rhizome rot ❌
Don’t disturb plants during blooming period
Refrain from over-fertilizing, which can lead to lush foliage with fewer flowers

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vivid blue border along pathwaysElegant perennial in mixed beds

Companion Plants

Hostas Daylilies Peonies Alliums

Multiply

Propagation Methods

Good to Know

Common Questions

Siberian Iris Roaring Jelly questions

What zones can Siberian Iris Roaring Jelly grow in?

Siberian Iris Roaring Jelly 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 Roaring Jelly deer resistant?

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

When does Siberian Iris Roaring Jelly bloom?

Siberian Iris Roaring Jelly 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 Roaring Jelly need full sun?

Siberian Iris Roaring Jelly does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.