Grevillea hybrid 'Old Gold'

Old Gold Grevillea

Botanical Name: Grevillea hybrid 'Old Gold'
Family: Proteaceae
Origin: Hybrid cultivar (Grevillea species native to Australia)
Plant Type: Evergreen flowering shrub

Overview

A spectacular hybrid grevillea perfectly suited to Adelaide's Mediterranean climate, Grevillea 'Old Gold' is prized for its profuse display of golden-yellow toothbrush flowers that cover the plant virtually year-round with peak displays in winter and spring. This compact, dense cultivar forms a rounded shrub with fine, deeply-divided grey-green foliage that provides excellent textural contrast in the garden. The masses of vibrant golden flower clusters create a brilliant display while attracting honeyeaters and native bees. Drought-tolerant once established, exceptionally long-flowering, and highly ornamental, it thrives in Adelaide's conditions while providing reliable colour and wildlife habitat with minimal care. Ideal as a feature shrub, informal hedge, bird-attracting garden centrepiece, or mass-planted for impact, 'Old Gold' brings reliable golden brilliance and year-round interest to South Australian landscapes.

Key Features

• Mature Size: 2.0–2.5 m H × 2.0–2.5 m W (compact rounded shrub); can be maintained smaller with regular pruning
• Growth Rate: 40–60 cm per year under good conditions (moderate to moderately fast-growing)
• Foliage: Deeply-divided, fine grey-green to grey leaves (5–8 cm long) creating soft, ferny texture; evergreen—provides year-round foliage interest
• Flowers: Dense golden-yellow toothbrush-style flower clusters (8–10 cm long); prolific flowering year-round with peak displays winter–spring (Jun–Oct in SA); highly ornamental and nectar-rich
• Fragrance: Not fragrant (flowers ornamental only)
• Seasonal Interest: Year-round golden flower display with heaviest flowering winter–spring; evergreen grey-green foliage provides constant textural interest; non-stop bird activity
• Wildlife Value: Attracts Nectar-feeding Birds (honeyeaters, wattlebirds, lorikeets—highly attractive); Good for Pollinators (native bees); provides dense habitat and nesting sites
• Tolerance: Excellent drought tolerance once established; exceptional heat tolerance; frost-hardy to -7°C; good wind tolerance; coastal-tolerant; sensitive to phosphorus (use low-phosphorus native fertiliser only); sensitive to root disturbance
• Planting Density: Tight hedge: 1–2 plants per metre @ 50–100 cm spacing; Standard hedge/screening: 1 plant per metre @ 1.0–1.5 m spacing; Specimen: 1 plant per 4–6 m²; Excellent in large containers (minimum 50 cm diameter)
• Pet Friendly: Generally safe (not known to be toxic; foliage generally not palatable to pets)

Where It Works Best

• Sunlight: Full sun (6–8+ hrs) for best flowering and compact habit; tolerates light afternoon shade but flowering reduced
• Soil: Well-drained sandy loam or gravelly soil essential; avoid heavy clay unless drainage dramatically improved; thrives in poor, low-nutrient soils; raised beds ideal if drainage questionable
• Water Needs:
  Establishment: Deep soak 2 times weekly for 8–12 weeks
  Established: Deep soak every 2–3 weeks in summer; monthly in cooler months; highly drought-tolerant once established; avoid overwatering
• Maintenance: Low to moderate maintenance; light tip-prune after main flowering flush to maintain compact shape and encourage dense growth; avoid hard pruning into old wood; mulch avoiding stem base; use low-phosphorus native fertiliser sparingly if needed; sensitive to root disturbance—avoid cultivating around base; generally pest and disease-free; occasional scale—minor
• Lifespan: 15–25+ years
• Climate Zones: Ideal for Mediterranean and temperate South Australia—Adelaide plains, foothills, Fleurieu Peninsula, Yorke Peninsula, Mid North, Adelaide Hills; performs exceptionally well in Adelaide's dry summer conditions
• Soil pH: Slightly acidic to neutral (pH 5.5–7.0); sensitive to highly alkaline soils—avoid pH above 7.5 or amend with sulphur

Landscape & Design Ideas

• Feature shrub for front gardens, courtyards and native gardens where year-round golden flowers and bird activity can be appreciated up close
• Informal hedge or screening for boundaries, creating living bird habitat while providing privacy and colour
• Mass planting for sweeps of golden colour in large gardens, parklands or roadside plantings with extended flowering impact
• Bird-attracting garden centrepiece—plant near outdoor living areas to enjoy honeyeater visits; pairs beautifully with other nectar-rich natives like Callistemon, Banksia and Eremophila
• Containers on sunny patios and balconies; fine foliage and golden flowers provide year-round ornamental appeal in confined spaces

Why You Will Love It

'Old Gold' delivers brilliant golden flowers virtually year-round—masses of vibrant yellow toothbrush blooms create non-stop colour when most plants rest. The constant parade of honeyeaters, wattlebirds and lorikeets brings gardens to life with movement and sound. Compact size suits suburban gardens, while drought tolerance and low maintenance align perfectly with Adelaide's climate. Fine grey-green foliage provides soft textural contrast year-round, and the dense rounded form needs minimal shaping. Thrives on neglect in well-drained soil, flowers relentlessly, and brings quintessential Australian bird-attracting brilliance with zero fuss—this is year-round native perfection for South Australian landscapes.