This link has some good information for combating and preventing the shamrocks from taking root in the flowerbeds. After all the hours I've spent digging and pulling them out, and carefully spraying (see previous posts: http://thymeinthegardenwithme.blogspot.com/2011/05/i-like-pulling-weeds.html and http://thymeinthegardenwithme.blogspot.com/2012/07/fighting-morning-glory-two-by-two.html) I'm going to try some of these techniques so I can spend some time doing something more rewarding in the garden. And less weeds in my flowerbeds makes me have better feelings towards my neighbor. I'm trying to be like Jesus. :)
http://www.ehow.com/how_12069144_kill-shamrock-plants.html
