Grevillea shiressii, commonly known as Blue Grevillea, is an evergreen shrub native to the sclerophyll forests and coastal heathlands of New South Wales, Australia. It typically grows to a height of 2–5 m (6.6–16.4 ft) and is recognized for its woody growth habit. The inflorescences are a notable feature, appearing from July to December, with each flower head consisting of two to nine individual flowers that are predominantly blue, a unique trait among Grevilleas. The flowers are not only visually striking but also attract a variety of birds, which are drawn to their nectar. The foliage of Grevillea shiressii is also a garden highlight, with its intricate texture and form.

In the garden, Blue Grevillea is valued for its ability to attract wildlife and provide shelter for birds. It is a versatile plant that can be used for screening, as a feature shrub, or in native plant gardens. This species is drought-tolerant once established, making it suitable for low-water landscapes. It thrives in full sun to part shade and prefers well-drained soils, ranging from sandy to loamy. The hybrid cultivars G. ’Ruby Clusters’ and G. ’Splendour’ offer gardeners additional options with their red flowers and attractive foliage. While generally low-maintenance, Grevillea shiressii can be susceptible to root rot in poorly drained soils and may attract pests such as aphids. It is also important to note that Grevilleas can be sensitive to phosphorus, so fertilizers for native Australian plants should be used.CC BY-SA 4.0