Common name: Coastal banksia
Botanical name: Banksia integrifolia
Management programme: Advisory
Originates from Queensland, Australia and was introduced to New Zealand for horticultural purposes. Naturalised in 1990 and is named after Sir Joseph Banks an English naturalist, botanist, and patron of the natural sciences who was on Cook's first voyage to New Zealand.
Why is it a pest?
Coastal banksia forms dense thickets in open areas. It is fast growing, rapidly maturing and produces a lot of seeds that are released as soon as they ripen in late summer. It threatens well drained sites, especially sand dunes.
Where is it found?
- It is tolerant of a wide range of habitats from estuaries and dunes to subalpine tussock.
- Generally found in coastal areas within 50km of the coast.
- Many seeds are produced and may require fire for germination.
- Spreads by seed fall and wind dispersal up to 300m from parent tree.
- Scattered in coastal Bay of Plenty.
What does it look like?
- Fast growing large shrub or small tree up to 15m high, with upright, cone shaped greenish-yellow inflorescences (flower heads) from March to April, that give rise to hard wooden cones with many seeds.
- Narrow, elliptic leaves, deep glossy green on upper with silvery felted undersides. Tough and leathery.
- Flower heads are 9-12cm long, erect, forming a broadly cylindrical cone, pale green or pale greenish-yellow.
- Individual flowers are very narrow and 10–15mm long, the long narrow petals rolling back on opening and become matted together.
- Flowers also produce nectar that is attractive to birds like the tūi. Flowers May to July.
What are the rules?
The Bay of Plenty Regional Council does not enforce the control of advisory species. It is landowner/occupier responsibility to manage these pests. Council may provide advice on how to manage or control these species if required.
How do you get rid of it?
- Pull small seedlings.
- Cut and paint stumps with herbicide gel.
- Drill and fill large trees with herbicide.
Site will need to be checked regularly for seedlings emerging.
CAUTION: When using any herbicide or pesticide, PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and directions for the purchase, use and storage of the product, are followed and adhered to.
Read more on pest control advice, information and regulations