Description Callistemon 'Kings Park Special' is a small tree grows from 3 to 5m tall and 3 to 4m wide. It produces bottlebrush flower spikes that grow up to 13 cm long and 6 cm wide, and are bright red in colour. The cultivar was grown from a seedling at Kings Park and Botanic Gardens in Perth. It was accepted for registration with Australian Cultivar Registration Authority (ACRA) in October 1986.