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The Plant Guide

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‘Boulder Blue’ Blue fescue

Festuca glauca 'Boulder Blue'

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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 CharacteristicsFoliage is very blue. Drought and heat tolerant.

CareTolerant of drought, heat, and poor soil. Grow in dry, well-drained soil of poor to moderate fertility in full sun. Divide every few years.

PropagationDivide in spring, or sow seed in a cold frame in spring, fall, or winter.

ProblemsErgot, powdery mildew, rust, smut, brown patch, leaf spot, net blotch, pink snow mold, anthracnose, eye spot, and summer blight can affect plants.

  • Genus : Festuca
  • Zones : 4, 5, 6, 7, 8
  • Plant Height : 6 to 12 inches
  • Plant Width : 6 to 12 inches
  • Moisture : Dry
  • Bloom Time : Early Summer, Summer
  • Light : Full Sun
  • Plant Type : Grasses
  • Flower Color : Green
  • Uses : Ground Covers
  • Maintenance : Low
  • Growth Rate : Moderate
  • Foliage Color : Purple/Burgundy
  • Characteristics : Showy Foliage
  • Plant Seasonal Interest : Spring Interest

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