HelpfulGardener.com

Not quite sure what to do with them. Do I cut them back to about 8 inches? Not sure at all..

I have read that you just need to prune them down from 1/3 to 1/2 of their size after your average date of last frost in Spring. See https://www.conard-pyle.com/index.cfm/fuseaction/kohome.showpage/pageID/47/index.htm