By Mum5
Australia 
Can I prune my bottlebrushes now I'm in qld?
30 Dec, 2015
Answers
Be sure to cut just below a former flower cluster--that's where the buds break the best.
1 Jan, 2016
Hi, welcome to GoY, Callistemon should be pruned after flowering, so as soon as it finishes flowering, {not knowing which species you have} you can prune, Derek.
30 Dec, 2015