My question is purely from the context of lazyness with fall weeding. I get so tired of fighting with them. Does the zone 5 winter do the seedlings in or will the same one be back in the spring?
Dandelions are winter perennials that can be spread by seeds and will return from the root or even a piece of the root. In general they are fairly easy to control with a combination of preemergent herbicides and postemergent herbicide applications made before seed dispersal. Before you start mixing your chemical, pick a batch of young dandelion leaves and make yourself a salad. I've been eating them myself ever since I was a little weed puller and they are delicious.