Blue Fescue 'Boulder Blue' (Festuca glauca): Intensely Blue Cascading Mounds

Blue fescue 'Boulder Blue' (Festuca glauca 'Boulder Blue') is regarded by some as the bluest blue fescue, forming compact, cascading mounds of foot-tall, intensely blue, narrow leaves attractive in all seasons.

Flowers & Hardiness

Blooms are generally secondary to foliage, but this cultivar blooms more heavily than most with summer spikelets. Long-lived and very hardy. Grow in groups in borders, rock gardens, or as groundcover.

Culture & Propagation

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. Divide in spring or sow seed in cold frame spring/fall/winter. Watch for various fungal diseases.

Quick Reference

• Height/Spread: 6–12 in.
• Growth Habit: Clumps
• Growth Pace: Moderate
• Light: Full sun only
• Moisture: Dry
• Maintenance: Low
• Bloom Time: Summer
• Flower Colors: Blue, green
• Foliage: Colorful/burgundy (intense blue)
• Attributes: Drought & heat tolerant
• Uses: Beds, borders, ground covers, rock gardens