Helictotrichon sempervirens

Common name: Blue oat grass
Description: cool season; clump forming
Foliage - blue; medium blade width; 50-60 cm (20-24") tall
Flowers - June-August; 50-100 cm (20-40")
Ideal conditions: full sun or light shade; fertile, moist soil; grows in a wide range of soils; good drainage is essential.
Coldest zone: 3

[more info]