perennial list: i-j

Iberis-Candy Tuft
Iberis sempervirens

10/36 in.
25/90 cm.

Sun or shade.

Green.

White.

May to June.
Zone 3.
Well-drained.

Ice Plant-Yellow
Delosperma nubigenum

4/24 in.
10/60 cm.

Sun.

Green.

Yellow.

May to June.
Zone 4.
Well-drained.

Iris-Arctic
Iris setosa

8/12 in.
20/30 cm.

Sun.

Green

Lavender

May to June.
Zone 2.
Well-drained.

Iris-Blue Flag
Iris versicolor

48/12 in.
120/60 cm.

Sun.

Green.

Lavender.

May to June.
Zone 2.
Moist.

Iris-Dwarf Bearded
Iris pumila

8/12 in.
20/30 cm.

Sun.

Green.

Purple, pink,yellow, white.

May to June.
Zone 2.
Well-drained.

Iris-German Bearded
Iris germanica

30/18 in.
75/45 cm.

Sun.

Green

Purple, pink, yellow, bronze.

May to June.
Zone 3.
Well-drained.

Iris-Japanese

48/18 in.
120/45 cm.

Sun or shade.

Green.

Various.

June to July.
Zone 4.
Moist.

Iris-Orris Root
Iris florentina

24/12 in.
60/30 cm.

Sun or shade.

Green.

Blue, yellow.

May to June.
Zone 4.
Well-drained.

Iris-Siberian
Iris sibirica

36/24 in.
90/60 cm.

Sun.

Green

Purple, white.

May to June.
Zone 2.
Well-drained.

Iris-Sweet
Iris pallida

24/12 in.
60/30 cm.

Sun.

Gold-green.

Lavender.

June to July.
Zone 3.
Well-drained.

Iris-Yellow Flag
Iris pseudacorus

48/24 in.
120/60 cm.

Sun.

Green.

Yellow.

May to June.
Zone 2.
Moist.

Jacob's Ladder
Polemonium caeruleum

36/12 in.
90/30 cm.

Sun or shade.

Green.

Bluish white.

May to July.
Zone 2.
Moist.

Japanese Spurge

8/12 in.
20/30 cm.

Shade.

Green.

White.

May
Zone 3.
Moist acidic.