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Blue fescue

W.carter / Wikimedia Commons - CC BY-SA 4.0

Blue fescue

Festuca glauca

Blue fescue (Festuca glauca) is a small, neat, evergreen ornamental grass native to Europe, grown almost entirely for its striking foliage: it forms a tidy, rounded, hedgehog-like tuft of fine, needle-thin, intensely steel-blue leaves. In early summer slim, wheat-coloured flower spikes rise just above the dome and fade to buff. Compact and orderly, it reads as a cool blue mound that holds its shape and colour through the seasons. Honesty matters with this grass: the famous blue is at its brightest only in full sun and lean, sharply drained soil - in rich, wet, or shaded ground it sulks, greens out, and rots. It is also short-lived, tending to die out in the centre after three or four years, so it must be lifted and divided regularly to keep fresh blue tufts coming. Like most exotic ornamental grasses it offers little to wildlife compared with native bunchgrasses. The trade's best-known form is the cultivar 'Elijah Blue', which holds the RHS Award of Garden Merit.

Climate fit: narrow (39/100)

Border

Filler

Container

Light

Full sun

Water

Low water

Mature size

8-12" tall · 10" apart

Hardy in zones

4a-8b

very cold to frosty winters

Native in Illinois

No

Related products

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.

Now

Zone 6b

Plotwright

USDA Zone 6b

-5°F to 0°F

Well-suited

2050

2100

Zone 7a

Plotwright

0°F to 5°F

Well-suited

In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.

✓

Well-suited today and still thriving in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.

Loading AHS heat-zone data for this location...

Where this plant fits

Suitable across 39 ecoregions - 31 climate-resilient through 2070 · 5 suited today · 3 newly possible by 2070. Best matches first.

Appalachian mixed mesophytic forests

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Appalachian-Blue Ridge forests

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Arizona Mountains forests

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Atlantic coastal pine barrens

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Blue Mountains forests

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Central Pacific Northwest coastal forests

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Central Tallgrass prairie

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Central-Southern Cascades Forests

What it needs

Conditions

Light

Full sun

Water

Low water

Spacing

10"

Habit

A small, neat, evergreen ornamental grass forming a tidy rounded hedgehog-tuft of fine, needle-like, intensely steel-blue leaves, with slim wheat-coloured flower spikes in early summer; grown mainly for the striking blue foliage. It demands full sun and sharp drainage - the blue is best in sun and lean soil, and the plant sulks, greens, and rots in rich, wet, or shaded ground. It is short-lived, tending to die out in the centre after three or four years, so lift and divide it regularly to keep fresh blue tufts going, and comb or rake the dead leaves out in spring.

Care tips

•

Give it full sun and lean, sharply drained soil - the steel-blue colour and tidy hedgehog form depend on it, and rich, wet, or shaded ground greens it out and rots it.

•

Do not over-water or feed; this is a poor-soil, low-moisture grass that sulks in fertile, moist conditions.

•

Comb or rake the dead leaves out in spring to keep each tuft fresh and brightly blue.

Lifecycle

Planting

Plant in spring in full sun and lean, sharply drained soil, spacing plants about 10 inches apart. Avoid rich, wet, or shaded sites - the steel-blue colour depends on sun and poor, gritty, free-draining ground, and the plant rots in heavy or soggy soil.

Transplanting

Lifts and moves easily as a small clump in spring; replant at the same depth in a sunny, sharply drained spot and water just enough to settle the roots, then let it run lean.

Early growth

Quickly forms a small, fine-textured blue tuft. Keep it weeded and unfed - overly rich soil and extra water green it out and soften the form. Comb or rake the dead leaves out each spring to keep the dome fresh and blue.

Maturity

A mature plant is a compact, evergreen, steel-blue dome about 8 to 12 inches tall and wide that flowers in early summer. It is short-lived: after three or four years the centre tends to die out, so lift and divide it regularly to renew it rather than expecting a single plant to persist.

Propagation

Propagate by division in spring - lift the clump and split it into fresh rooted pieces, replanting the vigorous outer sections and discarding any dead centre. Division both multiplies the plant and is the routine maintenance that keeps this short-lived grass going; named blue selections such as 'Elijah Blue' are divided rather than seed-grown to stay true.

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.

Catharanthus roseus

Annual vinca

A tender perennial from Madagascar grown across temperate North America as a heat-loving summer annual - a mounding 6-18 inch plant in the dogbane family covered in flat five-lobed phlox-like flowers from June to frost. The species blooms rosy-pink to red with a darker mauve throat, and it shrugs off the hot, humid weather that wilts most bedding plants. Every part of the plant is poisonous: it is the natural source of the vinca alkaloids used in chemotherapy.

Annual

Full sun / Part shade

Aubrieta (Aubrieta deltoidea) is a low, mat-forming evergreen perennial in the mustard family (Brassicaceae), native to the rocky hillsides of southeastern Europe - primarily Greece, the Aegean Islands, Crete, and adjacent Mediterranean coasts. It is one of the most reliable spring-flowering ground covers for sunny, well-drained spots: cascading sheets of violet to deep pink four-petalled blooms from March through May, attractive to bees and bee flies. The honest catch is that without a hard cut-back immediately after flowering, plants become woody and bare in the centre within two or three years, collapsing from a tight carpet into a tired, gappy mat.

Felicia amelloides is an evergreen, woody-based perennial subshrub native to a narrow coastal strip of South Africa's Western and Eastern Cape, where it colonises stabilising sand dunes, sandy flats, and rocky outcrops at 0 to 3,280.8 feet. In the garden it delivers a near-continuous flush of sky-blue, yellow-centred daisy flowers on neat mounding growth, typically 12 to 24 inches but capable of reaching about 3.3 feet, making it one of the few true blue-flowered plants for sunny pots and borders. The honest catch is frost-tenderness: it survives only light frost in sharply drained soil and collapses below about 23°F, so outside USDA zones 9-11 it must be overwintered under glass or replaced annually - a real commitment in cool-temperate gardens.

Campanula carpatica is a low, mounding herbaceous perennial native to the rocky subalpine habitats of the Carpathian Mountains, ranging across Poland, the Czech Republic, Slovakia, Romania, and Ukraine (Wikipedia). Its wide, upward-facing bell flowers in violet-blue, white, or pink appear from June through August, making it one of the longest-blooming edging perennials available, and it holds an RHS Award of Garden Merit. The honest catch is longevity: it tends to behave as a short-lived perennial, often thinning or declining after a few seasons, so gardeners should plan for regular division or fresh plants from seed to hold the planting.

Dianthus gratianopolitanus

Cheddar Pink

Cheddar pink is a low, mat-forming evergreen perennial pink (a Dianthus, not a true carnation) native to calcareous rock ledges and cliff faces across western and central Europe, from the protected population at Cheddar Gorge in England east to Ukraine. Its intensely clove-scented, fringed rose-pink flowers and blue-grey foliage make it one of the finest front-of-border edging plants in a sunny, sharply drained garden. The honest catch is drainage: in any soil that holds winter moisture the crown rots reliably, so it fails in heavy clay or irrigated beds and thrives only where drainage is sharp and the site stays dry underfoot in cold months.

Common houseleek, or hens-and-chicks (Sempervivum tectorum), is an evergreen alpine succulent that forms tight rosettes of fleshy, pointed leaves, each rosette (the "hen") ringed by smaller offset rosettes (the "chicks") on short runners. Barely a few inches tall, it spreads into a low mat and thrives in the harshest hot, dry, sharply drained spots: gravel, walls, sink gardens, and the tiled roofs it was once planted on. In summer a mature rosette sends up a stout stalk of star-shaped reddish-purple flowers, then that rosette dies, leaving its chicks to carry on. It is one of the toughest, most cold-hardy, most forgiving plants there is, asking only for sun and drainage and resenting nothing so much as wet, rich soil.

Perennial

Full sun / Part shade

Educator packet

Plant packet

Blue fescue educator packet

Blue fescue (Festuca glauca) is a small, neat, evergreen ornamental grass native to Europe, grown almost entirely for its striking foliage: it forms a tidy, rounded, hedgehog-like tuft of fine, needle-thin, intensely steel-blue leaves. In early summer slim, wheat-coloured flower spikes rise just above the dome and fade to buff. Compact and orderly, it reads as a cool blue mound that holds its shape and colour through the seasons. Honesty matters with this grass: the famous blue is at its brightest only in full sun and lean, sharply drained soil - in rich, wet, or shaded ground it sulks, greens out, and rots. It is also short-lived, tending to die out in the centre after three or four years, so it must be lifted and divided regularly to keep fresh blue tufts coming. Like most exotic ornamental grasses it offers little to wildlife compared with native bunchgrasses. The trade's best-known form is the cultivar 'Elijah Blue', which holds the RHS Award of Garden Merit.

Scientific name

Festuca glauca

Plant type

grass

Hardiness

4a-8b

Light

full-sun

Moisture

low

Spacing

10 inches