Firewitch dianthus

Sun

Full sun, ideally at least 6 hours daily. Light afternoon shade can help in hot climates, but too much shade reduces flowering.

Water

Water regularly while establishing, then during prolonged dry spells. Let the surface soil dry between waterings; established plants tolerate some drought.

Soil

Well-drained sandy, gravelly or loamy soil, preferably neutral to alkaline. Avoid heavy, waterlogged soil and rich, moisture-retentive compost around the crown.

Height

0.5-0.75 ft (0.15-0.23 m), including flowers

Spread

1-1.5 ft (0.3-0.45 m)

Flowers

Main flush in late spring to early summer, with occasional repeat flowers after trimming; single, fringed magenta-pink flowers with a clove-like scent.

Foliage

Evergreen. Narrow, blue-grey to silvery-green leaves form a dense, low cushion. Foliage may look weathered after severe winters.

Growth

Moderate

Care needed

Low

• Pollinators
• Deer resistant
• Drought tolerant
• Cold hardy
• Low allergen
• Fragrant

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Very tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   0.6 ft (0.19 m)

   full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Mildly toxic: may upset a stomach

Native to

the UK

Growth rate

Moderate

• Plant with the crown at soil level, not buried, and leave space for air to circulate.
• Water at soil level during establishment and prolonged drought; avoid keeping the foliage and crown constantly wet.
• Feed lightly in spring only if growth is weak; excessive nitrogen produces soft growth and fewer flowers.
• Use a thin gravel mulch rather than piling bark or compost against the crown.
• Divide healthy clumps in spring if they become crowded or develop bare centres.

Pruning. After the main flowering flush, clip off spent flower stems and lightly trim the leafy cushion to keep it compact and encourage some repeat bloom. In early spring, remove dead or damaged foliage without cutting deeply into bare, woody growth.

Early spring

Remove winter-damaged foliage and check that the crown is not buried under leaves or mulch.

Spring

Plant or divide clumps in freely draining soil; water new plants until established.

Late spring

Enjoy the main flowering flush and remove faded flowers as they finish.

Early summer

Lightly shear after flowering and take non-flowering shoot cuttings.

Summer

Water during prolonged drought and check for crown dieback in hot, humid weather.

Winter

Keep fallen leaves off the cushion and make sure water drains away from the roots.

• Edge a sunny path so the low foliage defines the border and the flower scent is close at hand.
• Plant among rocks or beside gravel, where the blue-grey cushions soften hard surfaces.
• Repeat small groups across the front of a border with lavender and catmint for contrasting foliage and flower shapes.
• Grow in shallow containers with drainage holes, pairing it with compact stonecrops.

Garden styles it suits: Cottage garden, Dry gravel garden, Alpine rock garden, Sensory garden, Low-maintenance and Small-space.

Plant it with: English lavender, Catmint, Creeping thyme, Candytuft, Creeping phlox and Stonecrop.

Wildlife: Flowers attract butterflies and some bees. Deer usually leave the foliage alone, although no plant is completely deer-proof.

• Crown or root rot: avoid waterlogged soil, keep mulch away from the crown and remove rotting plants; improve drainage before replanting.
• Sparse growth and poor flowering: move plants into full sun and avoid heavy feeding.
• Aphids on new shoots and buds: rinse off with water or use insecticidal soap according to the label if infestations persist.
• Bare, woody centres: divide healthy outer sections in spring or replace ageing plants with rooted cuttings.

Dianthus can cause mild poisoning in cats and dogs if eaten, including vomiting, diarrhoea and skin irritation; keep all parts out of reach of pets that chew plants. Contact with foliage or sap may irritate sensitive human skin, and ingestion may cause stomach upset. It is not known to be toxic to horses, but specific information for this cultivar is limited.

• Maiden pink (Dianthus deltoides)

  Usually has greener foliage, a looser spreading habit and smaller flowers, often marked with a darker ring around the centre.

• Garden pink (Dianthus plumarius)

  Typically has taller, looser flowering stems and more deeply feathered petals; cultivated forms vary widely.

• Sweet William (Dianthus barbatus)

  Has broader green leaves and dense, flat-topped clusters of flowers on taller stems rather than single flowers above a low blue-grey cushion.

Dianthus comes from Greek words meaning 'divine flower', gratianopolitanus refers to Grenoble in France, and the German cultivar name 'Feuerhexe' means 'fire witch'.

Propagation. Take cuttings from short, non-flowering shoots in late spring or early summer, or divide healthy clumps in spring. Seed does not reliably produce plants identical to 'Feuerhexe'.

Accepted botanical name

Dianthus gratianopolitanus

In the US and Canada

Introduced in Canada.

Native range

Belgium, Czechoslovakia, France, Germany, Great Britain, Poland, Switzerland and Ukraine.

Measured

Average height 16 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.