Idaho Fescue vs Silky Lupine - TreeTime.ca

Idaho Fescue vs Silky Lupine

Lupinus sericeus

Festuca idahoensis

CUSTOM GROW

CUSTOM GROW

Silky Lupine
Idaho Fescue

Silky Lupine is a native perennial wildflower known for its upright spikes of blue to violet flowers. Blooming from late spring into summer, the nectar-rich, showy blossoms attract a variety of pollinators, especially bees and butterflies. The plant’s fine, silky foliage provides soft texture and visual interest, enhancing landscapes throughout the growing season.

Silky Lupine is a nitrogen-fixing plant that enriches soils and supports surrounding vegetation. Its deep roots stabilize soil, and it spreads naturally by ejecting seeds from drying pods. If spread isn’t desired, new seedlings are easy to remove. While it is foraged by some wild animals, it contains alkaloids that are toxic to livestock. Silky Lupine is well-suited to pollinator gardens, naturalization plantings, erosion control, and ecological restoration projects.

Idaho Fescue is a native perennial bunchgrass recognized for its fine-textured, blue-green foliage. Its dense, tufted growth and deep root system make it drought-tolerant and effective at stabilizing soils, particularly on slopes and open grasslands. Its upright, arching form and dense clumps give it strong ornamental value in both natural and designed landscapes.

This hardy grass provides cover for wildlife and forage for grazing animals, while also supporting soil health and habitat diversity. Idaho Fescue is well-suited for erosion control, ecological restoration, naturalization, xeriscaping, and habitat enhancement projects.

Silky Lupine Quick Facts

Idaho Fescue Quick Facts

Zone: 4a
Zone: 4a
Height: 0.6 m (2.0 ft)
Height: 0.3 m (1.0 ft)
Spread: 0.5 m (1.5 ft)
Spread: 0.3 m (1.0 ft)
Light: any
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: medium
Growth rate: fast
Life span: short
Life span: short
Growth form: clump-forming
Growth form: clump-forming
Spreading: seeds - high
Spreading: seeds - low
Maintenance: medium

Toxicity: toxic to sheep and other livestock

Foliage: Silky-haired, palmately compound leaves
Flowers: Blue to violet pea-like flowers
Bloom time: mid to late summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC
Native to: AB, BC, SK
Other Names: blue bunchgrass, bluebunch fescue