Callistemon sieberi - Evergreen Trees Direct

Callistemon sieberi

$250.00

Tax included. Shipping calculated at checkout.

Size: 40cm/45L

40cm/45L

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: 2m - 3m Approximately

Mature Width: 3m – 5m

Callistemon sieberi is expected to grow Approx. 30 – 60 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)

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Shipping

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

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Contact

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Email: sales@evergreentrees.com.au

Phone: (03) 7042 3318

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About Your New Callistemon sieberi

Callistemon sieberi, commonly known as the River Bottlebrush, is a resilient Australian native shrub known for its soft-textured, linear foliage and pale yellow to creamy-white bottlebrush flowers. These eye-catching blooms appear in spring and attract birds and pollinators, adding biodiversity to the garden.

They look excellent when planted along waterways, in native gardens, or used as informal screens. Callistemon sieberithrives in full sun to part shade, tolerates frost and occasional waterlogging, and adapts well to both moist and drier conditions with minimal maintenance.

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: Australian Native

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Uses in my Garden

Screening or Privacy
Shrubs
Rural Property Planting
Revegetation or Regeneration
Council or Civic Landscapes
Plant in Pots (or) Suitable for Pots

Callistemon sieberi works in an:

Australian Native Garden – celebrates local plants with natural character.
Wildlife Garden – planting to attract birds, bees, and pollinators.
Coastal Garden – relaxed, seaside feel with hardy, textural plants.
Woodland Garden – layered, naturalistic design under dappled light.
Low-maintenance Garden – resilient choices for easy care and year-round appeal.

Is Callistemon sieberi Evergreen or Deciduous?

Callistemon sieberi is an Evergreen (foliage year round) Tree

Mature Height & Width

Mature Height: 2m - 3m Approximately

Mature Width: 3m – 5m

Callistemon sieberi is expected to grow Approx. 30 – 60 cm per year.

Growth Rate of Callistemon sieberi

Callistemon sieberi is expected to grow Approx. 30 – 60 cm per year.

They are considered to have a:

Medium Growth Rate
Fast Growth Rate

Frost Tolerance & Ideal Climate to plant Callistemon sieberi

Is Callistemon sieberi frost tolerant?

Callistemon sieberi is Frost Hardy – Survives heavy and frequent frost without damage.

Does Callistemon sieberi Flower?

Callistemon sieberi produces soft cream to pale-yellow bottlebrush flowers from spring through summer. These lightly coloured blooms cluster along the branch tips, creating a gentle seasonal display that contrasts beautifully with its fine, willow-like foliage.

Does Callistemon sieberi flower?

Yes - Flowers

Flowering Period:

Summer
Spring

Flower Type:

Fluffy

Flower Colour:

Yellow

Is Callistemon sieberi an Australian Native Tree?

Yes

Callistemon sieberi is Native to Eastern Australia, from Queensland through New South Wales, Victoria and Tasmania, where it grows naturally along rivers and streams.

What is the Wildlife Value of Callistemon sieberi ?

Its nectar-rich flowers attract honeyeaters, native bees, butterflies and other beneficial insects, while its dense evergreen foliage provides shelter and nesting sites for small birds. The extended flowering season also supports pollinators when other nectar sources are limited.

How much Sunlight does Callistemon sieberi need?

Callistemon sieberi will thrive best in:

Full Sun

Preferred Soil?

Callistemon sieberi performs best in well-drained sandy or loam soils and prefers slightly acidic to neutral conditions. It can tolerate poorer soils but may struggle in heavy clay or waterlogged positions unless improved with organic matter and coarse material to enhance drainage. Keep soil evenly moist during establishment, then gradually reduce watering as the tree matures and develops its excellent drought resilience.

Is Callistemon sieberi Drought Tolerant?

Is Callistemon sieberi Drought tolerant?

As a young tree it requires regular watering, but once established Callistemon sieberi develops excellent drought tolerance. It performs reliably in dry, inland and coastal environments and maintains its graceful habit with minimal supplementary watering.

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How To Plant Your Callistemon sieberi

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 sieberi

Hedging and screening: 1 to 1.5 metres apart for a dense informal screen, or 80 centimetres apart for a tighter formal hedge.

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

Callistemon sieberi is expected to grow Approx. 30 – 60 cm per year.

Medium Growth Rate
Fast Growth Rate

Long Term Care For Your Callistemon sieberi

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: Tip prune in late winter and again in summer to build dense growth. For a formal hedge, light shaping two to three times a year keeps lines crisp.

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 sieberi in Different Soil

Callistemon sieberi 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.

Frequently Asked Questions

Frequently Asked Questions

How do I enhance the flowering of Callistemon sieberi? Regular pruning and a balanced fertilizer can boost flowering.
Is it salt-tolerant? Yes, Callistemon sieberi can tolerate mild salt conditions, making it suitable for coastal plantings.