perennial list: y-z

Yarrow-Sneezewort
Achillea ptarmica

18/24 in.
45/60 cm.

Sun.

Green.

White.

June to Sept.
Zone 2.
Well-drained.

Yarrow-Fernleaf
Achillea filipendulina

48/18 in.
120/45 cm.

Sun.

Green

Golden yellow.

June to Sept.
Zone 2.
Well-drained.

Yarrow-Common
Achillea millefolium

30/24 in.
70/60 cm.

Sun.

Green.

Red.

June to Sept.
Zone 2.
Well-drained.

Yarrow-Moonshine
Achillea x 'Moonshine'

24/12 in.
60/30 cm.

Sun.

Silver

Yellow

June to August.
Zone 2.
Well-drained.

Yarrow-Woolly
Achillea tomentosa

8/12 in.
20/30 cm.

Sun.

Green.

Yellow.

May to July.
Zone 2.
Well-drained.

Yucca or Soapweed
Yucca glauca

24/18 in.
60/45 cm.

Sun.

Green.

White.

July.
Zone 3.
Well-drained.