Question
how do you prune a scotch broom? Ours has a lot of old wood at the bottom. Do I cut off the brooms. Pictures would help me if that is possible or detailed instructions. Thank you, Janet.

Answer
Hi Janet,
Thanx for your question.  Colorado State University has an excellent pamphlet on pruning flowering shrubs.  Please access the link below for information.  I hope it is helpful.

http://cmg.colostate.edu/gardennotes/619.pdf

Please note that Scotch broom is considered a noxious weed/invasive plant in Washington, Idaho, Oregon and California at least.  This plant should not be propagated in those states.

I hope this helps.
Tom