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Callistemon citrinus 'Harkness' – Harkness Bottlebrush
- Regular price
- $250.00
- Sale price
- $250.00
- Regular price
-
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A GRADE STOCK, EVERY TIME.
Learn About Your New Callistemon citrinus 'Harkness' - Harkness Bottlebrush
Callistemon citrinus 'Harkness' is a compact, evergreen Australian native shrub with dense growth and vivid red bottlebrush flowers. It’s ideal for hedging, screening, borders, and native gardens, offering year-round structure and reliable flowering.
It typically grows 1.5–2.5 metres tall with a bushy form that responds well to pruning. Crimson-red flowers appear in spring and again in late summer, attracting birds, bees, and beneficial insects. The fine foliage is aromatic when brushed, adding sensory appeal.
They look excellent when planted as a low hedge or grouped in native plantings. Callistemon citrinus 'Harkness' thrives in full sun, tolerates light frost, and is drought-tolerant once established, making it a reliable choice for low-maintenance, bird-friendly, and coastal gardens.
Plant Profile
Planting & Spacing Tips
Post Planting Care
Tips for Various Soil Types
1. Botanical & Physical Characteristics
BOTANICAL NAME:
Callistemon citrinus 'Harkness'
GENUS:
Callistemon
BOTANICAL SPECIES:
citrinus
COMMON NAME:
Harkness Bottlebrush
FAMILY:
Myrtaceae
EVERGREEN / DECIDUOUS:
Evergreen (foliage year round)
FOLIAGE TYPE
FORM & SHAPE
2. Growth & Environmental Conditions
GROWTH RATE
EXPECTED GROWTH PER YEAR
Approx. 40 – 60 cm per year
MATURE HEIGHT
2m - 4m Approximately
MATURE WIDTH
1.5m – 2m
SUNLIGHT EXPOSURE
FROST TOLERANCE
Frost Hardy – Survives heavy and frequent frost without damage.
AUSTRALIAN NATIVE?
Yes
3. Practical Uses & Flowering
USES:
FLOWER COLOUR
Red
FLOWER TYPE
FLOWERING PERIOD
Planting Tips
Plant Spacing
Ensuring A Strong Start
Root Ball Dimensions (Width × Depth) for Planting
Use this as a reference when digging your planting hole. We recommend digging at least 10% wider than the dimensions below to encourage strong root development.
- 30cm Pot: 33cm (W) × 30cm (D)
- 40cm/45L Pot: 44cm (W) × 41.5cm (D)
- 50cm Pot: 49.5cm (W) × 35.2cm (D)
- 70L Pot: 55cm (W) × 41.8cm (D)
- 100L Bag: 50.6cm (W) × 52.8cm (D)
- 100L Pot: 66cm (W) × 49.5cm (D)
- 150L Bag: 66cm (W) × 55cm (D)
- 200L Bag: 71.5cm (W) × 60.5cm (D)
- 300L Bag: 88cm (W) × 63.8cm (D)
- 400L Bag: 99cm (W) × 66cm (D)
- 500L Bag: 122cm (W) × 66cm (D)
- 750L Bag: 134cm (W) × 69cm (D)
- 1000L Bag: 146.3cm (W) × 71.5cm (D)
- 2000L Bag: 176cm (W) × 82.5cm (D)
Post Planting Care
When planting a new tree or shrub, proper watering is essential to ensure healthy establishment and long-term growth. Follow these guidelines to give your plant the best start:
- Immediately After Planting:
Water generously right after planting to settle the soil around the roots and eliminate air pockets. This helps the roots make good contact with the soil. - First Three Months (Establishment Phase):
The initial three months are critical for root development. Water deeply twice daily (morning and evening) to encourage strong, deep root growth. - Irrigation Systems:
If using an irrigation system, adjust it to provide adequate water during the establishment phase. Ensure the water reaches the root zone without overwatering. - Weather Considerations:
Adjust watering based on weather conditions. Increase frequency during hot, dry periods and reduce it during cooler, wetter seasons. - Ongoing Care:
After the establishment phase (3 months), gradually reduce watering frequency but ensure the plant receives consistent moisture, especially during dry spells.
Long Term & Ongoing Care
Growing Your Callistemon citrinus 'Harkness' – Harkness Bottlebrush in Various Soil Types
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