Illustration
Blue Fescue
Festuca glauca
Blue Fescue blooms from June through July.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Blue Fescue
Plant it in full sun. It prefers low water. It is hardy in USDA zones 4–8. Expect it to reach about 12 in tall and 12 in wide at maturity, in roughly 2 years (not yet checked).
No toxicity note is on file for Blue Fescue. That is not a clearance: check its safety for people and pets before planting.
What was checked
Mature height and spread, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not, and each fact above says which. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Blue Fescue
Plant Blue Fescue in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. In zone 6, the middle of its hardy zones 4 to 8, spring means March to May and fall means August or September. Once settled, it blooms from June to July.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 6, the middle of this plant's hardy range, start with zone 6 in March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Blue Fescue get?
12 intall5 ft 7 inan adult12 inwideSee Blue Fescue in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant Blue Fescue
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Blue Fescue about 12 in apart, center to center, so each plant has room to reach its full width.
Add Blue Fescue to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
Blue Fescue's height, spread, hardiness zones, sun and trait tags were checked against 3 published sources on July 29, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- Missouri Botanical GardenPlant Finderheight, spread, hardiness zones, sun and trait tags
- NC State ExtensionPlant Toolboxheight, spread, hardiness zones, sun and trait tags
- University of Wisconsin HorticultureUniversity of Wisconsin-Madison Horticulture Extensionheight, spread, hardiness zones and sun
How the checking works, and what each standard covers, is on the verified plants page.
Comes in 2 varieties
Same plant, same care - pick the variety you are growing.
Compare every variety in the Blue Fescue group
Every figure is the variety's own page fact. Tap a name to open it.
| Variety | Color | Blooms | Hardiness | Sun | Size (H × W) |
|---|---|---|---|---|---|
| Bluethis page | Foliage | Jun–Jul | Zones 4–8 | Full sun | 12 in × 12 in |
| Cool As Ice | Foliage | Jun–Jul | Zones 4–8 | Full sun | 12 in × 12 in |
| Golden Toupee | Foliage | Jun–Jul | Zones 4–8 | Full sun | 12 in × 12 in |
Good to know about Blue Fescue
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note. A note reports what its source says; where that differs from a fact above, the fact above is this entry's stored value, and its mark says whether it has been checked.
Worth knowing
The silvery-blue color is not fixed: it develops fully only in full sun and lean, dry soil, and fades toward green in shade or rich, moist ground. per Wisconsin and Missouri Botanical
Deer-resistant, not deer-proof
Rutgers rates it top-tier, rarely damaged, for its fine wiry blades. But NC State notes deer and rabbits still graze it under pressure. Treat it as resistant, not proof. per Rutgers and NC State
Short-lived; divide to refresh
Clumps stay attractive only a few years (often 2 to 3) before the center dies out. Divide every 2 to 3 years: discard the dead center, replant the vigorous edges. per NC State
Summer slump is normal
A cool-season grass: it grows in spring and fall, then looks tired, yellowed, or semi-dormant in summer heat. That mid-summer decline is normal, not death. Do not panic-water it. per Wisconsin
Wet soil is the killer
It wants lean, gritty, sharply drained soil and prefers the dry side. Wet, heavy ground rots the crown and roots. A gravel mulch that keeps the crown dry aids survival. per Illinois
Well-behaved clumper, not invasive
It stays in a tidy tuft and expands only very slowly, with no running rhizomes, so it is not invasive. The one spread path is light self-seeding from dropped seed. per Iowa State
What pairs well with Blue Fescue
Good companions share its growing conditions and add something it lacks: an earlier or later bloom, a lower carpet in front, or structure through winter.
Creeping Phlox
Shares full sun and low water; blooms in mid spring, before this one opens; lower at 6 in, for the front of the border; pink against yellow, for contrast.
Basket of Gold
Shares full sun and low water; blooms in mid spring, before this one opens; lower at 8 in, for the front of the border; echoes the yellow.
Russian Sage
Shares full sun and low water; overlaps, then carries the display into mid fall; taller at 4 ft, for the layer behind it; blue against yellow, for contrast.
Lilac
Shares full sun and low to moderate water; blooms in mid spring, before this one opens; stands well above at 10 ft, a canopy to plant beneath; purple against yellow, for contrast.
Viburnum
Shares full sun and low to moderate water; blooms in mid spring, before this one opens; stands well above at 6.5 ft, a canopy to plant beneath; its white flowers settle the yellow.
Crocus
Shares full sun and low water; blooms in late winter, before this one opens; lower at 4 in, for the front of the border; purple against yellow, for contrast.
Little Bluestem
Shares full sun and low water; blooms in late summer as this one finishes; taller at 3.5 ft, for the layer behind it; blue against yellow, for contrast.
Grape Hyacinth
Shares full sun and low water; blooms in early spring, before this one opens; lower at 8 in, for the front of the border; blue against yellow, for contrast.
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Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.