Does it need fertilizer?

It needs very little feeding. It is sensitive to phosphorus, so if you do fertilize, use only a low phosphorus fertilizer made for native plants.

Can I grow it in a pot?

It is best suited for the ground but can be grown in a very large container for a few years.

Plant guide

Saw Banksia.

Banksia serrata

Pronounced BANK-see-uh seh-RAY-tuh

Banksia serrata — Photo by cassi saari (CC0) via gbif

The Saw Banksia is a striking Australian native known for its unique, cone shaped flower spikes. It thrives in well drained, sandy soils and adds a rugged beauty to any garden. You will love how its architectural foliage stands out all year long.

Another photo of Saw Banksia — Photo by Guy Taseski (CC BY) via iNaturalist

At a glance

Care level: Moderate
Plant type: Evergreen tree
Light: Full sun
Indoor light: Direct sun
Water: Every 7 to 14 days
Mature size: 15 meters
Growth rate: Medium
Hardiness: USDA 9 to 11
Bloom time: Late summer to early winter

Care

Plant this beauty in a spot with excellent drainage to prevent root rot. Keep an eye out for yellowing leaves, which often signal that the soil is holding too much moisture. It is quite hardy once established and appreciates plenty of sunshine.

Watering: Water deeply when the top few inches of soil feel dry to the touch.
Feeding: Use a low phosphorus fertilizer specifically formulated for native plants.
Pruning: Lightly trim after flowering to maintain a tidy shape and encourage new growth.
Repotting: Only repot if the plant is clearly root bound, as they prefer to stay undisturbed.
Soil: Sandy, acidic, well drained
Soil pH: 5.5 to 6.5
Temperature: -5 to 35°C
Humidity: 40 to 70%
Drought tolerance: High
Lifespan: Perennial, typically 20 to 50 years.
Fragrance: Light
Deer and rabbits: High

Signs it needs repotting

Roots growing out of the drainage holes.
Water sitting on the surface for too long.
Stunted growth despite healthy conditions.

Safety

People: There is no known toxicity to humans.
Children: The sharp, serrated leaf edges and woody seed cones pose a minor risk of scratches or injury to small children.
Contact allergens: The stiff, serrated leaves can cause minor skin scratches if handled without gloves.
Airborne allergens: The pollen may cause mild respiratory irritation in sensitive individuals during the flowering season.
Edibility: The plant is not considered edible for humans.

How to identify it

Large, cylindrical flower spikes
Serrated, leathery green leaves
Woody, cone like seed follicles
Sturdy, gnarled tree trunk

Height: 4 to 10m
Spread: 3 to 6m
Leaves: dark green, evergreen
Flowers: yellow, cream, 7 to 12cm
Fruit: brown, Late summer

Problems to watch for

PhytophthoraCommon
Root RotCommon
Leaf ScorchUncommon
Myrtle RustUncommon
Scale InsectsUncommon

By symptom

Plant problems by symptom

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Growing it

Propagation: seed
When to plant: spring, autumn
Overwintering: Ensure the plant is in a well drained spot to prevent root rot during wet winters. No special protection is needed in its preferred climate zones.
In containers: It is not ideal for long term container growth due to its large size and sensitive root system.

Seed propagation

1. Collect the woody cones after they have matured.
2. Place the cones in a warm oven or near a fire to trigger the follicles to open.
3. Shake the seeds out and sow them in a sandy, well drained seed raising mix.
4. Keep the soil lightly moist until germination occurs.

Group with other low phosphorus, drought tolerant Australian natives to maintain soil balance.

Grows well with

Coastal Rosemary · It shares similar coastal environmental requirements and soil preferences.
Grass Tree · Both plants thrive in the same nutrient poor, sandy habitats.

Similar species

Wallum Banksia · It has a similar appearance but features different seed cone structures.

Science

Family: Proteaceae
Genus: Banksia
Order: Proteales
Class: Magnoliopsida
Native range: Eastern Australia, primarily along the coast.
Conservation: This species is common and not currently of conservation concern.

It thrives in sandy, well drained soils and relies on fire to trigger seed dispersal.

Value to wildlife: nectar source, habitat for small birds
Pollinators: bees, butterflies, birds
Uses: ornamental tree, coastal garden specimen, wildlife garden

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 6/9
Soil reaction: 4/9
Light: 8/9
Temperature: 7/9
Moisture: 3/9
Nutrients: 1/9

Taxonomy resolved against GBIF.

Questions people ask

Does it need fertilizer?: It needs very little feeding. It is sensitive to phosphorus, so if you do fertilize, use only a low phosphorus fertilizer made for native plants.
Can I grow it in a pot?: It is best suited for the ground but can be grown in a very large container for a few years.

Where the name comes from

The genus is named after Sir Joseph Banks, who collected the first specimens in 1770. The species name serrata refers to the saw like teeth on the leaf edges.

Good to know

The iconic seed cones were immortalized as the Big Bad Banksia Men in the Snugglepot and Cuddlepie children's books.
It is commonly known as the Saw Banksia due to its distinctively serrated leaf margins.
The plant is highly adapted to nutrient poor sandy soils.
Indigenous Australians used the flower spikes as hairbrushes and to strain honey.

Also in

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.