Pretty, cold-hardy and short-lived. Where blue fescue works and where it will not.
Get a Free Planting PlanBlue fescue will grow in the High Desert, but it is not a low-water plant here. The county’s Guide to High Desert Landscaping says it does best in partial shade with consistent water, and growers call it short-lived, especially in hot climates. Use it in small, shaded spots on drip, or pick blue grama if you want a grass that runs on less water.
Top photo: Photo: Paradise Chronicle, CC BY-SA 4.0, via Wikimedia Commons
Ornamental grass · Festuca glauca · Also called Blue Fescue Grass, Festuca ovina glauca · Native to France; not a California native
| Blue Fescue at a glance in the High Desert | |
|---|---|
| Type and size at maturity | Small clumping cool-season grass, 6 to 10 in tall and wide (MSWN). The SB County guide describes 3 to 4 in mounds (SBG p.23) [2] |
| Growth rate | Fast, but short-lived [2] |
| Water once established | Moderate (WUCOLS IV, Region 5, High and Intermediate Desert). The SB County guide says it does best with consistent water (SBG p.23) [3] |
| Sun | Takes sun but does best in partial shade; use on north or east exposures (Guide to High Desert Landscaping, p.23) [1] |
| Cold hardiness | -30F, USDA zone 4 [2] |
| Heat | Best suited to middle and higher elevations; not happy in the low deserts and short-lived in hot climates [2] |
| Soil | Needs good drainage; especially short-lived in heavy clay [2] |
| Bloom | Summer flower spikes that quickly turn tan and stay on through winter [2] |
| Pets | Not listed by the ASPCA; check with your vet [4] |
| Where it fits | Rock gardens, north or east exposures, borders along lawns or walks. Tolerates no foot traffic (Guide to High Desert Landscaping, p.23) [1] |
Blue fescue sells well because of its color. The tight, silver-blue tufts look great in a nursery flat. In a Victor Valley yard, it has two limits you should know about before you buy a dozen of them.
It is a cool-season grass. MSWN says it is best suited to middle and higher elevations and is not happy in the low deserts. At 2,200 to 4,000 feet, the High Desert sits in between, with summer highs averaging about 97F in July. That is why an east-facing bed or the shade of a wall makes such a difference.
None of this means you cannot grow it. It means you should plant it where it will be happy, and keep your expectations realistic.
Cold is no problem. MSWN rates blue fescue to -30F, USDA zone 4. The Victor Valley is zone 8b, with record lows near 0F, so winter never threatens it. See our frost dates and growing zones guide for local numbers.
Summer heat is the stress point. In full afternoon sun against a block wall or next to a driveway, reflected heat adds to the load. That is exactly the spot the county guide steers you away from. Give it morning sun and afternoon shade where you can.
Wind is not much of an issue for a plant this small. At 6 to 10 inches tall, blue fescue sits below most of the spring wind. Its bigger risk in spring is drying out between waterings on a hot, windy day, so check the soil after a wind event.
Drainage matters. MSWN warns that blue fescue is especially short-lived in heavy clay. Most High Desert soils are sandy and alkaline, which is fine, but caliche layers can hold water in the root zone. Test the hole by filling it with water; if it does not drain in a few hours, break through the hardpan or choose another spot. Our High Desert soils guide covers caliche.
Plant in fall or early spring, while temperatures are cool. It is a cool-season grass, so a hot June planting is the hardest start you can give it. In spring, wait until after the median last freeze around March 18 in Victorville.
WUCOLS IV rates blue fescue as moderate water in Region 5, the High and Intermediate Desert, and the SB County guide calls for consistent water. On drip that usually means:
Our High Desert irrigation guide explains how to zone drip by water need.
If you want a grass that runs on less water in full sun, look at blue grama (Bouteloua gracilis). WUCOLS IV rates blue grama as low water in Region 5, the High and Intermediate Desert, compared with moderate for blue fescue.
Deer grass is another option if you have more room. It is a California native, rated to -10F, and takes full sun and reflected heat. See our deer grass page.
Where blue fescue still earns its spot:
Skip Mexican feather grass as a substitute. Cal-IPC lists it as invasive in California. For more grass and plant ideas, see our best drought-tolerant plants for the High Desert.
Pull out dead clumps and replant gaps; blue fescue is short-lived. Check drip emitters as weather warms.
Keep water consistent. Cut off flower spikes after bloom, as the SB County guide suggests, if you want a neat mound.
Good time to plant or replace plants, while temperatures are cool. Ease off watering as nights cool.
Shear in late winter to keep plants looking fresh (MSWN). Water about once a month in dry spells.
Not in the High Desert. WUCOLS IV rates it moderate water for our region, and the county’s Guide to High Desert Landscaping says it does best with consistent water. Blue grama is rated low water and is a better pick for a dry, sunny spot.
Mountain States Wholesale Nursery rates blue fescue to -30F, USDA zone 4. Cold is never the problem in the Victor Valley. Summer heat is.
Blue fescue is not listed by the ASPCA as toxic or non-toxic. Check with your vet if your dog chews on plants.
Not long. Mountain States Wholesale Nursery calls it short-lived, especially in hot climates or heavy clay. Plan on replacing some plants every few years.
Fall or early spring, while it is cool. It is a cool-season grass, so avoid planting in early summer. In spring, wait until after the median last freeze around March 18 in Victorville.
We checked every number on this page against the public sources below. If a rule or date changes, the agency page is the final word.
Monarch designs and installs rockscape, drip irrigation and drought-tolerant plantings across the High Desert. We will check sun, wind and soil on your lot and tell you where a plant will do well and where it will struggle.
Get a Free Planting PlanOr call (760) 792-7627
