I found this Callistemon in a garden in Corvallis, OR over 20 years ago. For the previous 30 years it had thrived through the coldest (0ºF or -18ºc) winters. Upright growing fine textured evergreen shrub to 6′ tall and 3′ wide in 7 years. 2″ pale yellow fluffy brushes appear in late spring/summer and again in early autumn. Full sun, average soil – especially good in clay soils and regular summer water- though it can live on no supplemental water in summer irrigation improves fall bloom. Completely deer resistant. Perfectly hardy in all of Western Oregon. Long lived shrub that tolerates heavy snow and ice. Easy shrub. Moderately fast growing. Excellent performance on the Oregon coast. Prune if needed after bloom has ended. Excellent companion shrubs are Ceanothus x ‘Topaz’ and Myrtus communis ‘Andy’s Hardy’ which bloom simultaneously,
Xera Plants Introduction.