Red fescue

Festuca rubra

In other languages: Rood zwenkgras (Nederlands) · Fétuque rouge (Français)

Grows wild in Belgium.

Red fescue is a fine-leaved native grass, 20–70 cm tall, that is very common throughout Belgium. It grows in hay meadows and pastures on poor to moderately fertile soil, on road verges, dykes and banks, in dunes, on heaths and even on salt marshes along the coast. You recognise it by its thread-like basal leaves, flatter stem leaves, loose panicle that is often tinged reddish purple, and the reddish base of the shoots. With its creeping rhizomes it forms a fine, dense sward, which is why it is in many lawn, verge and dyke seed mixes. For a flowery grassland on poor soil it is an ideal base grass, and the caterpillars of the marbled white and other browns feed on it.

Updated on 9 October 2026

Light
Sun or partial shade
preferably some sun
Moisture
Dry to normal
no wet feet
Hardiness
Fully hardy
down to -30 °C
Size
0.5 m
tall, 0.3 m wide
Flowering
May–July

Key facts
Pruning months	July and September
Height	0.5 m
Native to Belgium	Yes
Flowering	May–July

Identify

How to recognise it

Habit: Fine-leaved grass of 20–70 cm that forms a loose to dense sward from creeping rhizomes; some forms grow in loose tufts.
Leaf: Basal leaves thread-like and inrolled, 0.5–1.5 mm thick, dark green to bluish green; stem leaves flatter and up to 3 mm wide. The sheaths of the basal leaves are closed into a tube and often reddish at the base.
Flower: Loose panicle of 5–15 cm, open during flowering and contracted afterwards, in May–July. Spikelets 7–10 mm long, often tinged purple or reddish, with short awns of 1–3 mm.
Fruit/Seed: Narrow grains, ripe in July–August.
Roots: Fine, creeping rhizomes and a dense network of fine roots just below the surface.
Confusion with: Sheep’s-fescue has only thread-like leaves, on the stem too, no rhizomes, and grows in dense tufts on dry, poor soil. Common bent has flat leaves and an airy panicle with tiny, single-flowered spikelets without awns.

Flowering: May–July · Pruning: July and September

In your garden

Why grow it?

One of the main foodplants of the marbled white, and also food for the caterpillars of, among others, the gatekeeper, meadow brown and small heath.
An ideal base grass for a flowery grassland: fine, not too tall and not very competitive, so that the flowers get room.
Tolerates drought, salt and poor soil: good for verges, dykes, banks, green roofs and sandy soil.
Forms a dense, fine sward that holds the soil and stands up to trampling, and suits a lawn that you mow only now and then.
Grasshoppers, beetles and spiders live in the fine sward; the tufts offer shelter in winter.

Red fescue: where does it grow best?

In the wild: unimproved hay meadows and pastures, road verges, dykes, banks, dunes, heaths and salt marshes.
Sun to partial shade; it tolerates more shade than most lawn grasses.
Dry to moist, poor to moderately fertile soil: sand, loam or light clay, acid to chalky. Also tolerates salt.
In the garden: as the base grass in a flowery meadow or flowering lawn, on a bank, along a path or on a green roof.

Goes well with

Oxeye daisy: White flowers in May–June in the same poor grassland.
Bird’s-foot trefoil: Yellow flowers for bees and foodplant of the common blue.
Harebell: Blue bells in summer on poor, dry soil.
Common cat’s-ear: Yellow flowers from June to September for bees and hoverflies.
Brown knapweed: Purple flowers in July–August for bees and butterflies.

Maintenance

Red fescue: when and how to plant it?

Buy seed of native origin from a nursery for wild plants, preferably in a mix with other fine grasses and wild flowers. Lawn varieties are bred for a neat lawn, not for a flowery meadow.
Sow from late August to October or in March–April on a fine, weed-free, loosened seedbed; no cold period is needed.
Sow thinly and evenly, rake in very lightly and roll or firm the seed well.
Keep the soil moist until the seedlings appear, after 1–3 weeks.
For a flowery meadow on rich soil: first make the soil poorer by mowing and removing the cuttings for a few years, or strip off the rich topsoil.
Never cut turves in the wild or from a road verge.

Care

Watering: Only during germination. Afterwards not needed: in dry summers it turns brown, but it recovers after rain.
Feeding: Never: fertiliser favours rye-grass and cock’s-foot, which crowd out the fine fescue and the flowers.
Mowing: Flowery meadow: mow in early July and in September, leave the hay for a few days and then remove it. Flowering lawn: every 3–6 weeks at 5–8 cm.
Removing cuttings: Always remove the cuttings: this keeps the soil poor and the grassland rich in flowers.
Rotational mowing: Leave a strip standing each time so that caterpillars and grasshoppers survive.

Tip: Sow red fescue as the base grass in a flower meadow on poor soil and never feed it: it then stays fine and low, and the flowers get room.

Pruning and mowing

Pruning months: July and September.

When: Early July, after flowering, and in September.

How:

Mow at 5–10 cm with a scythe or bar mower, in dry weather.
Leave the hay for 2–3 days so that seed can drop, then remove it.
At each cut, leave a strip standing as a refuge for insects and overwintering caterpillars.
In a flowering lawn, mow high and not too often, so that low flowers can bloom.

Caution: Do not mow short in winter: the young caterpillars of the marbled white and other browns overwinter low down in the grass.

Pruning: when and how · Pruning calendar and basic rules

Propagation

Seed: Collect ripe seed in July–August and sow it in September or in spring; it germinates readily without a cold period.
Division: In March–April or in September, cut out pieces of turf with rhizomes and replant them elsewhere; keep them moist until established.

Red fescue: how does it get through the winter?

Hardy to −30 °C.

Evergreen: the fine leaves stay green to grey-green, sometimes tinged red.
Fully hardy, to about −30 °C.
Young caterpillars, beetles and spiders overwinter in the dense sward.
Tolerates road salt on verges.

Diseases and pests

Crowded out: On fertile soil rye-grass and cock’s-foot outgrow it. Do not feed, and mow and remove the cuttings.
Brown in drought: In a dry summer it turns brown. Do not water: it greens up again by itself after rain.
Red thread: In a lawn, sometimes pinkish-red patches with red threads on the leaves, especially in warm, humid weather. Usually harmless: aerate the soil, remove the clippings and the grass recovers by itself.
Thatch: In a lawn a layer of dead stems can build up. Rake or scarify lightly in spring.

Through the year

March: New growth. Sow or divide.
April: Sow on a fine seedbed. Rake the lawn lightly.
May: Flowering starts: the panicles turn reddish purple.
June: In full flower. Marbled whites fly over the meadow.
July: Mow in early July and remove the hay; leave a strip standing.
August: Collect seed.
September: Second cut. Sow.
October: Last chance to sow.
December: Evergreen; caterpillars overwinter in the sward.

You and this species

Did you know?

Rubra means ‘red’, after the often reddish spikelets and the red base of the shoots.
Some forms grow on salt marshes that are regularly flooded by the sea; along roads salted in winter, red fescue also holds its own well.
With its creeping rhizomes a single plant can spread very far: in Scotland a clone was found that stretched over more than a hundred metres and was estimated to be over a thousand years old.

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