Ornamentalornamental grassStraightforward

Blue fescue

Festuca glauca

A small tight hedgehog of steel-blue needle leaves, evergreen, used in gravel gardens and containers where a low mound of strong colour is wanted. It is short-lived and goes brown in the middle after a few years, and the answer is to divide it rather than to feed it.

Position: Full sun
Water: low demand
Drainage: Free-draining
Grows to: 20–35 cm × 25–40 cm
Hardiness: H6
Flowers: June and July
Difficulty: Straightforward

August

Nothing to do

No sowing, planting, harvesting or pruning window falls in August.

Blue fescue’s year

Resolved for United Kingdom (general). Every window is stored against a climate event rather than a date, so a late frost pocket runs later than the band shows. What else August calls for.

Activity	A	M	J	J
Plant	April.	May.
In flower			June.	July.
Divide	April.	May.

Timing that travels

The band above resolves this plant's windows into months for one region. These are the windows themselves, stored against a climate event rather than a date — which is the form that survives being carried to a colder garden, a frost pocket, or next year.

Conditions it needs

Light: Full sun
Frost: Very hardy
Hardiness rating: H6 (RHS)
Grows best at: 10–27 °C
Soil: Sandy, Loam, Chalky
Soil pH: 6–7.8
Drainage: Free-draining
Water needs: low
Drought: good tolerance
Waterlogging: poor tolerance
Heat: good tolerance
Wind and exposure: good tolerance

Where these figures come from

LightSourced guidancemoderate confidence: Royal Horticultural Society: Blue fescue — position
Checked 2026-08-13
FrostSourced guidancehigh confidence: Royal Horticultural Society: Blue fescue — hardiness
Checked 2026-08-13
Hardiness ratingSourced guidancemoderate confidence: Royal Horticultural Society: RHS hardiness ratings
Checked 2026-08-13
Grows best atSourced guidancemoderate confidence: Royal Horticultural Society: Blue fescue — temperature
Checked 2026-08-13
SoilSourced guidancemoderate confidence: Royal Horticultural Society: Blue fescue — soil
Checked 2026-08-13
Soil pHSourced guidancemoderate confidence: Plant Finder — Missouri Botanical Garden: Festuca glauca — culture
Checked 2026-08-13
DrainageSourced guidancemoderate confidence: Royal Horticultural Society: Blue fescue — soil
Checked 2026-08-13
Water needsHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
DroughtHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
WaterloggingHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
HeatHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
Wind and exposureHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13

On your soil

Computed by comparing this plant's recorded requirements against each soil's recorded characteristics. A recorded horticultural fact overrides the comparison where GrowingHQ holds one.

Soil	Verdict	Why
Heavy clay	Works, with one condition	Blue fescue will crop on heavy clay, but one thing has to be dealt with first. It needs ground that drains, and this soil holds water. A plant that stays in the ground through winter with its roots in cold, saturated soil rots — which is what kills most of what fails on heavy ground, rather than the cold.Improve the drainage before planting — a raised bed, or bulky organic matter worked in over several seasons. Do not add sand to clay in small quantities; it makes the problem worse.
Sandy	Prefers this soil	Sandy suits Blue fescue as it stands: The pH suits it: it wants 6 to 7.8, and this soil is in that range. The free drainage is exactly what it wants. Sandy soil is among the soils it is recorded as suiting. It stands dry conditions better than most, which this soil will test.
Chalky and alkaline	Prefers this soil	Chalky and alkaline suits Blue fescue as it stands: The free drainage is exactly what it wants. Chalky soil is among the soils it is recorded as suiting. It stands dry conditions better than most, which this soil will test.
Loam	Prefers this soil	Loam suits Blue fescue as it stands: The pH suits it: it wants 6 to 7.8, and this soil is in that range. The free drainage is exactly what it wants. Loam is among the soils it is recorded as suiting. The soil holds moisture, which saves a great deal of watering.
Silty	Prefers this soil	Silty suits Blue fescue as it stands: The pH suits it: it wants 6 to 7.8, and this soil is in that range. The free drainage is exactly what it wants. The soil holds moisture, which saves a great deal of watering.
Peaty and acid	Works, with one condition	Blue fescue will crop on peaty and acid, but one thing has to be dealt with first. It needs ground that drains, and this soil holds water. A plant that stays in the ground through winter with its roots in cold, saturated soil rots — which is what kills most of what fails on heavy ground, rather than the cold.Improve the drainage before planting — a raised bed, or bulky organic matter worked in over several seasons. Do not add sand to clay in small quantities; it makes the problem worse.
Shallow over rock	Prefers this soil	Shallow over rock suits Blue fescue as it stands: The free drainage is exactly what it wants. Loam is among the soils it is recorded as suiting. It stands dry conditions better than most, which this soil will test.
Made ground and urban soil	Works, with one condition	Blue fescue will crop on made ground and urban soil, but one thing has to be dealt with first. It needs ground that drains, and this soil holds water. A plant that stays in the ground through winter with its roots in cold, saturated soil rots — which is what kills most of what fails on heavy ground, rather than the cold.Improve the drainage before planting — a raised bed, or bulky organic matter worked in over several seasons. Do not add sand to clay in small quantities; it makes the problem worse.

Not sure which you have? Four hand tests will settle it.

Space and spacing

Mature height: 20–35 cm
Mature spread: 25–40 cm
Rooting depth: 25 cm
Spacing: 25–35 cm apart

Where these figures come from

Mature heightHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
Mature spreadHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
Rooting depthHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13
SpacingSourced guidancemoderate confidence: Royal Horticultural Society: Blue fescue — spacing
Checked 2026-08-13

Measured centre to centre. Plants set closer than this compete for light and water long before they look crowded, and the crowding cannot be undone once they are in.

In a container

Minimum volume: 3 litres or more
Minimum depth: 20 cm

Where the container figures come from

Minimum volumeHorticultural consensusmoderate confidence: Royal Horticultural Society: Festuca glauca — cultivation
Checked 2026-08-13
Minimum depthHorticultural consensusmoderate confidence: Royal Horticultural Society: Festuca glauca — cultivation
Checked 2026-08-13

Suits a pot well, provided the compost is gritty and free-draining — the blue colour is best on poor dry soil and a plant in rich damp compost goes greener and flops. Use it as a small permanent pot or as the structural element in a mixed one. Comb the dead material out with your fingers in spring rather than shearing it, and expect to replace or divide the plant every three or four years as it dies out in the middle.

Habit and ultimate size

What the plant becomes, rather than what it is when you buy it. The gap between the two is where most planting mistakes live.

The stem section is the reliable test in any season. What follows from it is how the plant is cut back, which is where getting it wrong actually costs something.

Foliage: Evergreen
In a container: Good in a container long-term

Where these figures come from

FoliageSourced guidancehigh confidence: Royal Horticultural Society: Festuca glauca — foliage
Checked 2026-08-13
In a containerHorticultural consensusmoderate confidence: No external citation — see the evidence type above.
Checked 2026-08-13

Where and how you can grow it

Each way of growing is assessed separately, and “not assessed” is a real answer rather than a gap we have filled in with a guess.

Method	Suitability	What it needs
Open ground	Well suited source Sourced guidancemoderate confidence Royal Horticultural Society: Growing method suitability Checked 2026-08-13
Traditional dug bed	Well suited source Sourced guidancemoderate confidence Royal Horticultural Society: Growing method suitability Checked 2026-08-13
Raised bed	Well suited source Sourced guidancemoderate confidence Royal Horticultural Society: Growing method suitability Checked 2026-08-13
Container	Well suited source Sourced guidancemoderate confidence Royal Horticultural Society: Growing method suitability Checked 2026-08-13

Growing it

PropagationLift and split the clump every two or three years, throwing away the brown dead centre and replanting the living outer pieces. A blue fescue that has gone hollow in the middle cannot be fed or watered back into shape — division is the only remedy and it works completely.
PlantingThe blue colour is a waxy bloom on the leaf and it develops properly only in full sun on lean dry soil. Rich ground and shade both produce a greener, floppier plant, so it is the one grass here that is actively better for being underfed.

Where this guidance comes from

PropagationSourced guidancehigh confidence: Royal Horticultural Society: Festuca glauca — division
Checked 2026-08-13
PlantingSourced guidancemoderate confidence: Plant Finder — Missouri Botanical Garden: Festuca glauca — culture
Checked 2026-08-13

The rule is the same in all four: the new piece needs both a growing point and roots of its own. A cutting is the exception that has to make its roots afterwards, which is why the node matters so much.

Sources for this page

GrowingHQ editorial synthesis · Plant Finder · Royal Horticultural Society

Each figure on this page carries its own citation, under the “where these figures come from” note in its section. Record last reviewed 2026-08-14.