Enjoy pulling, although you can try scalping it with a mower and hope for the best (which won't work; vinca can regrow pretty well from a scalping without too many issues).

Also, if you're in the northern tier and planting northern grass, spring seedings have horrible failure rates, so I'd recommend waiting until August instead. Southern grasses, like Bernuda and Zoysia, need to be planted in spring, so the time is either Already Too Late, Right Now, or Very Soon, depending--let us know where you are!

I’m located in southeast Michigan, thanks! Our current plan was to mow, use a rototiller to loosen the roots, then diligently rake out the roots. Apply plastic sheeting for 7-10 days, weed out any remaining growth, and then do a sod. Will the sod help prevent future growth of the periwinkle?

Sod differs, you can do sod any time (except full-on summer) as long as you keep it damp until it roots.

Solarization--where you lay plastic sheeting--will help kill the vinca, but it may take more than 10 days. And I'd skip the rototilling, it's a recipe for disaster as you disturb the soil, damage the soil profile, and render it uneven for the next ten years.

Do yourself a favor. Don't rototill or rake. You won't rake out enough of the root systems to make a difference anyway.

Scalp, solarize, sod, and irrigate it in. Will you still get vinca? Probably. Vinca minor is pernicious stuff and, being a vine, will happily thread through your grass. And difficult to unseat. Keep a close eye out.

Unfortunately, the conditions that will settle and seat the sod will also restore the vinca to health. And I've seen vinca go through a wood pile fire and come back just fine from being baked under the collapsing pile.

Keep an eye on it through this summer and water as necessary--the first summer will be the most touchy.

Feed gently around Memorial Day with any good fertilizer of your choice. Organic at full rate, good nitrogen level synthetic, whatever, about half bag rate. Being where you are, Milorganite should be easily available. I'd recommend 20 pounds per thousand square feet of Milo, personally. It's...let's just say it's organic and stop there.

...Honestly? I'm tempted to give you my "we invented herbicides for a reason, and this is it" lecture. :-) This is not a condition of continuous overuse, and you're not dumping Weed and Feed, which I detest. It would be a one-time shot to take out something you don't want, including killing the roots, and then replace it with sod. You'd get a more reliable kill, followed by a 10-day solarization to sterilize the top of the soil, then sodding. Glyphosate has no residual that's going to do harm after 10 days to new sod; it soil-binds far faster.

Certainly wear gloves and long pants, and shower immediately after use--exactly as the bottle recommends and has always recommended.

But that's your decision. Picking it out will work...eventually...with a lot of effort. Lecture ends.

Okay, thank you so much! You have convinced me to not rototill and just carefully use an herbicide.