Go for some wellies Shortie, not only do they do the job, but make you feel like a proper gardenener to boot too!
I've several pairs of walking boots that I used to use when we first started on our plot, (including some German Para Boots that are the most comfortable shoes I have ever worn, and are fab for hill walking too!) but they are just a little too much bother, especially when you want to go home at the end of a long day, wellies just slip off, boots have to be de-laced first!