Description Grevillea 'Coastal Glow'is a fast-growing medium, spreading shrub growing 2 m to 4 m tall. The leaves are long and narrow growing up to 20 cm long and 2 cm wide. It produces purple red toothbrush-shaped flower clusters about 7 cm long throughout the year. Grevillea 'Coastal Glow'is reported to be a hybrid whose between Grevillea barklyana and either Grevillea asplenifolia or Grevillea longifolia.