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Festuca glauca 'Boulder Blue'
Deer Resistant IconRock Garden IconFoot Prints Icon

Plant Type: Grasses

Regarded by some as the bluest blue fescue, this plant forms compact, cascading mounds of foot-tall, intensely blue, narrow leaves that are attractive in all seasons.

Blooms are generally secondary to the foliage, but this cultivar blooms more heavily than most, with spikelets in summer. This cultivar is long-lived and very hardy. Grow in groups in a border or rock garden, or as a groundcover.

Noteworthy Characteristics:  Foliage is very blue. Drought and heat tolerant.
Care:  Tolerant of drought, heat, and poor soil. Grow in dry, well-drained soil of poor to moderate fertility in full sun. Divide every few years.
Propagation:  Divide in spring, or sow seed in a cold frame in spring, fall, or winter.
Problems:  Ergot, powdery mildew, rust, smut, brown patch, leaf spot, net blotch, pink snow mold, anthracnose, eye spot, and summer blight can affect plants.

Currently not available for online purchase.

Growing & Maintenance Tips:

Flower Color

Beige seed heads

Foliage Color


Plant Spread

7-12 in.

Good Companions

Bugleweed, Coreopsis, Gas Plant, Hardy Geranium, Tall Bearded Iris, Pinks, Prairie Mallow, Carex, Dianthus, Armeria, Sisyrinchium. ,

Plant Height

6-12 in.

Scape Height

Hardness Zone


Soil Moisture

Average water needs

Characteristics & Attributes


Ground cover, Mass Plant, Rock Garden

Bloom Time

June to July

Critter Resistance


Full sun to part shade

Growth Rate

Seasonal Interests

Spring to Fall