Zone 4 · winter lows -30°F to -20°F

Iris for Zone 4

223 Iris varieties rated hardy through Zone 4, ranked by how many gardeners actually grow them. Zone 4 is short, intense seasons — plants here are the toughest in the catalog.

223 hardy hereof 256 Iris totalLast frost ~mid-May

The Iris that thrive in Zone 4

#1 most saved

German Iris Bearded Iris

Iris germanica 'Mix'

Zones 4–9· 285 saves· from $8

#2 most saved

Celebration Song Iris

Iris tenuissima 'Celebration Song'

Zones 4–9· 273 saves· from $15

#3 most saved

Siberian Iris 'Paprikash'

Iris x hybrida 'Paprikash'

Zones 4–9· 200 saves· from $17

Poem of Ecstasy German Iris

Iris x germanica 'Poem Of Ecstasy'

Zones 4–10· 200 saves

Baboon Bottom Bearded Iris

Iris germanica 'Baboon Bottom Bearded'

Zones 4–9· 187 saves

Bewilderbeast KickStart Bearded Iris

Iris x germanica 'Bewilderbeast KickStart'

Zones 4–9· 173 saves

Immortality Tall Bearded Iris

Iris siberica 'Immortality'

Zones 4–10· 130 saves· from $13

Ruffled Velvet Siberian Iris

Iris sibirica 'Ruffled Velvet'

Zones 4–9· 111 saves· from $33

War Chief Bearded Iris

Iris germanica 'War Chief'

Zones 4–9· 93 saves· from $15

Pseudata Iris

Iris pseudata

Zones 4–9· 92 saves

Forever Blue Reblooming Dwarf Bearded Iris

Iris x germanica 'Forever Blue Dwarf Reblooming'

Zones 4–10· 75 saves

Navy Blue Crested Iris

Iris cristata 'Navy Blue'

Zones 4–9· 70 saves

Siberian Iris 'Silver Edge'

Iris sibirica 'Silver Edge'

Zones 4–8· 57 saves· from $17

Bearded Iris

Iris germanica 'Titan'

Zones 4–10· 57 saves

City Lights Tall Bearded Iris

Iris x germanica 'City Lights'

Zones 4–10· 57 saves· from $15

Harvest of Memories Bearded Iris

Iris x germanica 'Harvest Of Memories'

Zones 4–9· 55 saves· from $13

Virginia Iris

Iris virginica 'Carl Amason'

Zones 4–9· 55 saves

Harlequin Blueflag 'John Wood'

Iris versicolor 'John Wood'

Zones 4–9· 55 saves· from $28

Iris

Iris iris

Zones 4–8· 52 saves

Blue Flag Iris

Iris versicolor

Zones 4–9· 52 saves· from $10

German Bearded Iris

Iris x germanica 'Purple Flame'

Zones 4–10· 51 saves· from $17

Golden Edge Bearded Iris

Iris germanica 'Golden Edge'

Zones 4–9· 50 saves· from $13

Reblooming Bearded Iris

Iris x germanica 'Reblooming Mix'

Zones 4–10· 50 saves

Jurassic Park Reblooming Bearded Iris

Iris x germanica 'Jurassic Park Reblooming'

Zones 4–10· 48 saves

Showing the 24 most-saved of 223 Zone 4–hardy Iris varieties. See the full Iris list →

Iris in Zone 4

Will Iris survive a Zone 4 winter?

223 of the 256 Iris varieties in the Sow catalog are rated hardy through Zone 4, where winter lows reach -30°F to -20°F. Hardiness is per-variety, not per-genus — the plants listed above are the ones that hold up; others in the genus are not rated for this zone.

When should I plant Iris in Zone 4?

In Zone 4 the last spring frost typically lands around mid-May and the first fall frost around late September. Planting after the last frost — or in early fall, so roots establish before the ground cools — gives the best establishment. Each plant page lists its own planting months.

Which Iris is best for Zone 4?

Start at the top of the list above: it is ranked by how many gardeners actually save and grow each variety, which is a strong real-world reliability signal. Then narrow by your sun exposure and the mature size that fits the bed.

Keep exploring

All Iris

Every Iris variety (256)

Iris in other zones

More for Zone 4

See Iris in your Zone 4 yard

Snap a photo of your space and Sow places these varieties in it at true mature size — then keeps the care schedule for everything you plant.