Pruning is mostly unnecessary if the plant is not in a confined position. It should form a rounded shrub about 2 m diameter in open sun. Banksia spinulosa grows well in soils ranging from light through to moderately heavy with good moisture and drainage. Soils with high lime content lead to yellowing foliage and poor growth. Canberra winter frosts do not impede its growth and forms from southern sources can be regarded as frost hardy.
Germination occurs two to five weeks after sowing.
The seed remains viable for several years. Propagation from cuttings taken in late spring is used to retain specific colour forms. Specimens grown from seed take two to three years before flowering and from five to six years to attain their full height. Banksia spinulosa is an easy plant for the home gardener to cultivate. It has an attractive habit and many showy flower spikes.