Grevillea Crithmifolia

Grevillea / Prostrate / Little Crith

Botanical Name: Grevillea crithmifolia
Family: Proteaceae
Origin: Coastal Western Australia
Plant Type: Evergreen shrub (prostrate to low-mounding)

Overview

A tough coastal native that forms a dense, weed-suppressing carpet of fine, grey-green foliage and a spring flush of cream-white, nectar-rich flowers. Grevillea crithmifolia thrives in sandy, free-draining soils and sea breezes, making it ideal for banks, foredunes (second line), verge plantings, rockeries and spilling over walls in South Australian gardens.

Key Features

• Mature Size: 0.3–1.0 m H × 1–3 m W (varies by form; generally low and spreading)
• Growth Rate: 20-40 cm per year under good conditions
• Foliage: Fine, evergreen grey-green leaves; dense, clip-responsive habit
• Flowers: Nectar-rich, cream to white “toothbrush/spider” clusters; peak in late winter–spring with spot blooms in mild periods
• Seasonal Interest: Year-round groundcover; late winter–spring flower peak adds soft, honeyed tones
• Wildlife Value: Excellent for honeyeaters and native bees; dense cover for lizards/small birds
• Tolerance: Drought-tolerant (once established), heat-tolerant, wind-tolerant, coastal-tolerant (second line), light frost (protect from hard frost); prefers sandy soils (avoid heavy, poorly drained clay)
• Planting Density: Mass planting: 2–4 plants per m² (tight carpet). Edges/drifts: 1–2 per linear metre
• Pet Friendly: Yes — generally regarded as non-toxic; discourage chewing (sap may irritate sensitive mouths/skin)

Where It Works Best

• Sunlight: Full sun to light part shade (best flowering in sun)
• Soil: Well-drained sand or sandy loam; tolerates limestone; avoid waterlogging; use low-phosphorus native fertiliser
• Water Needs: Establishment: 2 deep soaks/week for 8–12 weeks. Established: deep soak every 10–14 days in summer; monthly in winter if dry
• Maintenance: Mulch in spring; light tip-prune after flowering to keep dense (avoid cutting into old bare wood); feed lightly with native (low-P) fertiliser in early spring
• Lifespan: 10–20+ years
• Climate Zones: Suited to temperate and Mediterranean SA gardens, including coastal areas
• Soil pH: Slightly acid to alkaline — naturally happy on neutral to alkaline, sandy/limestone soils

Landscape & Design Ideas

• Living mulch on banks and dunes (second-line coastal) to suppress weeds
• Spill over retaining walls, rockeries and native garden edges
• Combine with Westringia, Lomandra, Dianella and other water-wise natives for layered texture

Why You Will Love It

A low, resilient, bird-magnet groundcover that shrugs off heat, wind and coastal conditions, stays neat with a quick trim, and delivers soft cream-white blooms right when the garden needs a lift — a set-and-forget performer for SA landscapes.