Callistemon Viminalis 'Slim' - Evergreen Trees Direct

Callistemon Viminalis 'Slim'

$160.00

Tax included. Shipping calculated at checkout.

Size: 30cm/33cm

30cm/33cm 40cm/45L 75L 100L

All stock is grown, maintained and graded in strict accordance with AS 4373-2007, Australian Standard for Nursery Stock.

Current Stock Height Guides

40cm/45L: Enquire within for height guide information.

Height guide disclaimer: Height ranges are approximate only. As living products, plant heights naturally vary between individual plants, batches, and seasons. No guarantee is given that supplied plants will fall within the stated range. If minimum heights are required, you mustconfirm current batch heights with Evergreen Trees Direct prior to purchase. Variation in height is normal and is not grounds for return, refund, replacement, or compensation.

Mature Height & Width

Mature Height: 2.5 – 3 meters

Mature Width: 1 – 1.5 meters

Callistemon Viminalis 'Slim' is expected to grow 20 – 40 cm per year.

Root Ball Dimensions

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 / 70L Pot: 55cm (W) × 41.8cm (D)
100L Bag: 50.6cm (W) × 52.8cm (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)

Trade

We supply advanced trees to landscapers, developers, architects, and councils Australia-wide. Trade clients receive fast quotes, expert advice, and access to premium stock with reliable freight.

Register or learn more ›

Shipping

Shipping is calculated at checkout based on the pallet space your order occupies in the truck and your delivery location.

There is no charge to calculate your freight.

Contact

Have a question or a list to send through to us?

Email: sales@evergreentrees.com.au

Phone: (03) 7042 3318

Our 20% Off EOFY Sale is Live

20% off sale applies automatically at checkout. No Code Required. Applies to Orders over $1,500

About Your New Callistemon Viminalis 'Slim'

Callistemon viminalis ‘Slim’ is a compact, narrow-growing bottlebrush ideal for tight spaces, hedging, or feature planting in modern gardens. This Australian native cultivar maintains a naturally upright form, typically reaching around 3 metres tall with a spread of just 1–1.5 metres, making it perfect for small gardens, along driveways, or beside fences.

‘Slim’ produces vibrant red bottlebrush flowers in spring and autumn, attracting birds, bees, and pollinators. The foliage is dense and evergreen, providing year-round screening and structure. Hardy and low maintenance, it thrives in full sun, tolerates most soil types, and handles both drought and light frost once established. Responds well to pruning after flowering to maintain shape and density.

Enriched Planting Mix (AO Certified)

$21.95

Features and Benefits

Organically certified product
Improves aeration for roots
A rich blend of Pure Magic Compost, composted animal manure, Gypsum, composted coarse bark and wetting agent
Excellent to mix with heavy clay soils, an organic mixture with added gypsum which is perfect for exotic plants
Revitalises tired soils, adds nutrient and organic matter, no chemical additives, weed free
Assists in retaining moisture in the soil longer after rain or watering

Directions For Use

Water plant well at least several hours prior to planting.
Dig a hole at least twice the width of the pot and 7cm deeper than the pot.
Mix Grow Better Enriched Planting Mix with the soil that has been dug out of the hole, adding about 1/3 planting mix.
Spread a 7cm layer of improved soil in the hole and remove plant from the pot. Tease roots gently if the root ball is very firm and place plant in the planting hole. Check that pot soil is level with the surrounding soil surface level, not higher or lower.
Fill in the hole with improved soil mixture, firm down soil and water well adding Grow Better Plant Starter to final watering.

View full details

Type:

Enriched Planting Mix (AO Certified)

$21.95

Type:

Camellia hiemalis 'Hiryu' - Sasanqua Camellia Hiryu

From $160.00

Type: Hedging and Screening Trees

Camellia japonica White Nun Balls

From $600.00

Type: Hedging and Screening Trees

Pittosporum tobira 'Miss Muffet'

From $120.00

Type: Australian Native

Correa 'Tucker Time Dinner Bells'

$120.00

Type: Australian Native

Leptospermum obovatum 'Starry Night' – Starry Night Tea Tree

From $250.00

Uses in my Garden

Screening or Privacy
Feature Tree
Driveway Border
Council or Civic Landscapes
Underplanting

Callistemon Viminalis 'Slim' works in an:

Australian Native Garden – celebrates local plants with natural character.
Formal Garden – structured, symmetrical design with clipped shapes.
Modern Garden – sleek, minimal, and design-led planting.
Wildlife Garden – planting to attract birds, bees, and pollinators.
Low-maintenance Garden – resilient choices for easy care and year-round appeal.

Is Callistemon Viminalis 'Slim' Evergreen or Deciduous?

Callistemon Viminalis 'Slim' is an Evergreen (foliage year round) Tree

Mature Height & Width

Mature Height: 2.5 – 3 meters

Mature Width: 1 – 1.5 meters

Callistemon Viminalis 'Slim' is expected to grow 20 – 40 cm per year.

Growth Rate of Callistemon Viminalis 'Slim'

Callistemon Viminalis 'Slim' is expected to grow 20 – 40 cm per year.

They are considered to have a:

Medium Growth Rate
Fast Growth Rate

Frost Tolerance & Ideal Climate to plant Callistemon Viminalis 'Slim'

Is Callistemon Viminalis 'Slim' frost tolerant?

Callistemon Viminalis 'Slim' is Frost Tolerant – Can handle light to moderate frost once established.

Does Callistemon Viminalis 'Slim' Flower?

Callistemon viminalis ‘Slim’ produces bright red bottlebrush flowers from spring through summer, with a lighter repeat flush in autumn. The vivid blooms sit neatly along its narrow, upright branches, giving a bold seasonal display without adding bulk to its slender habit.

Does Callistemon Viminalis 'Slim' flower?

Yes - Flowers

Flowering Period:

Spring
Autumn

Flower Type:

Pollinator-attracting

Flower Colour:

Red

Is Callistemon Viminalis 'Slim' an Australian Native Tree?

Yes

Callistemon Viminalis 'Slim' is Native to Derived from Callistemon viminalis, which is native to eastern Australia, particularly along watercourses and moist soils in Queensland and New South Wales.

What is the Wildlife Value of Callistemon Viminalis 'Slim' ?

Its nectar-rich flowers attract honeyeaters, native bees, butterflies and other beneficial insects, while the dense, upright foliage provides shelter for small birds. Its long flowering period offers ongoing support for pollinators across much of the year.

How much Sunlight does Callistemon Viminalis 'Slim' need?

Callistemon Viminalis 'Slim' will thrive best in:

Full Sun

Preferred Soil?

Callistemon viminalis ‘Slim’ performs best in well-drained sandy or loam soils and prefers slightly acidic to neutral conditions. It tolerates nutrient-poor soils but may struggle in heavy clay or waterlogged sites unless improved with organic matter and coarse material to boost drainage. Keep soil evenly moist during establishment, then transition to deep, occasional watering as it matures and develops excellent drought resilience.

Is Callistemon Viminalis 'Slim' Drought Tolerant?

Is Callistemon Viminalis 'Slim' Drought tolerant?

As a young tree it requires regular watering, but once established Callistemon ‘Slim’ develops excellent drought tolerance. It thrives in hot, dry and coastal environments and maintains strong flowering and a tidy, columnar form with minimal supplementary watering.

youtube

How To Plant Your Callistemon Viminalis 'Slim'

Site: Choose a well-drained position in full sun to part shade with room for the canopy to develop.

Soil preparation: Enrich the planting area with quality compost and aged manure for a strong establishment phase.

Hole: Dig twice as wide as the root ball and the same depth.

Planting: Position level with the surrounding soil, backfill gently, firm in, then water deeply to settle the roots.

Recommended Planting Spacing For Your Callistemon Viminalis 'Slim'

Feature tree: 3 to 4 metres apart to allow the full canopy and form to develop.

Avenue planting: 3 metres apart for a uniform soft-textured avenue.

Callistemon Viminalis 'Slim' is expected to grow 20 – 40 cm per year.

Medium Growth Rate
Fast Growth Rate

Long Term Care For Your Callistemon Viminalis 'Slim'

Watering: Water deeply twice weekly through the first 12 months. Once established, this is drought tolerant and only needs a deep soak during extended dry periods.

Mulching: Apply a 5 to 7 centimetre layer of organic mulch over the root zone, keeping it 5 centimetres clear of the trunk.

Pruning: Minimal pruning required. Light tip prune in late winter to maintain shape if used as hedging or screening. For a clear trunk feature, remove lower branches as the tree grows.

Fertilising: Apply a slow-release native blend in early spring and again in autumn. Avoid high-phosphorus formulations as a precaution.

Pest and disease: Hardy against most pests and diseases. Occasional inspection in warm humid conditions is all that's needed.

Planting Your Callistemon Viminalis 'Slim' in Different Soil

Callistemon Viminalis 'Slim' performs best in well-drained sandy loam or loam with a slightly acidic to neutral pH. Adaptable to a wide range of soils when drainage is improved with organic matter.

Sandy soil: Free-draining and ideal. Mulch well to maintain consistent moisture.

Clay soil: Improve drainage with gypsum and organic compost before planting.

Loam: The preferred soil for steady root development and consistent growth.

pH: Slightly acidic to neutral preferred. Mulch with composted leaf litter to maintain levels naturally.