May Lawn & Landscape Checklist for Sheboygan County
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Quick answer: May lawn care in Wisconsin runs at full speed: lock in weekly mowing because the grass won't wait, fertilize around Memorial Day, and get plants and mulch into the beds once frost danger passes, which is mid-May inland and a week or two later along the Lake Michigan shore.
April was about hitting one window. May is about keeping up with everything at once.
Grass grows faster this month than any other on the Sheboygan County lawn care calendar, beds want planting, and every mulch pile in the county is spoken for. Here's the month, start to finish.
Early May: lock in the mowing rhythm
Weekly mowing is the floor in May, not the goal. Miss a week during the spring flush and you're suddenly cutting off half the blade, which breaks the one-third rule and leaves the lawn pale, clumpy, and stressed.
Keep the deck at 3 to 3.5 inches and hold the schedule. If you've been tempted by biweekly service to save a few dollars, May is exactly where that plan falls apart; our guide on how often Wisconsin lawns should be mowed runs the math.
A steady weekly rhythm is also where striped lawns come from. Clean lines don't happen on a lawn that gets rescued every other week.
Mid-May: planting season opens
The last frost usually clears mid-May for inland zone 5b, around Plymouth, Sheboygan Falls, and Elkhart Lake. Along the zone 6a lakeshore in Sheboygan, Kohler, and the Town of Wilson, the lake keeps spring cool, so tender annuals wait a little longer.
Once frost risk passes, everything goes: annuals, perennials, shrubs. If a bed needs a rethink before it deserves new plants, our garden bed design and installation guide covers shapes, edging, and plant choices, and May is peak season for our enhancement crews.
Mid-May: mulch goes down
May mulching hits the sweet spot: the soil has warmed, and the summer weeds haven't won yet. Keep it 2 to 3 inches deep and pulled back from trunks and stems; the full how-to is in our spring mulch guide.
Budget-wise, the typical market range in Sheboygan County is about $75 to $110 per cubic yard installed, and most bed refreshes take 3 to 8 yards. Our mulch installation cost guide breaks the numbers down.
Rather point at the beds and have it all handled? Request a free quote, call or text (630) 460-7320, or message us on Facebook. Mulch, plants, and clean edges in one visit.
Late May: fertilize around Memorial Day
Memorial Day is the first fertilizer anchor on the UW-Madison Extension lawn calendar, and it's the easiest one to remember. The turf is growing hard and can actually use the feed.
The other two anchors are July 4, which you skip if it's hot and dry, and Labor Day. One measured application now beats three careless ones, so follow the bag rate and don't double up.
All month: watch for creeping charlie in bloom
Those small purple flowers spreading through the shade in May are creeping charlie announcing itself. Fall is the best window to treat it, but the spring bloom is the second-best, so if you're going to spray before September, this is the moment.
The full playbook is in our creeping charlie control guide, with UW-Madison Extension behind the timing. Skip the blanket spray either way; treat the patches, not the whole lawn.
The May checklist
| Task | When | Why |
|---|---|---|
| Mow weekly at 3–3.5 inches | All month | May growth outruns a biweekly schedule and breaks the one-third rule |
| Plant annuals and perennials | After last frost: mid-May inland, later lakeshore | Frost kills tender plantings, and the lake sets shoreline timing |
| Install or refresh mulch | Early-to-mid May | Warm soil plus 2–3 inches of mulch means fewer weeds all summer |
| Fertilize the lawn | Around Memorial Day | First UW-Extension anchor date, when turf can use the feed |
| Spot-treat creeping charlie | While it blooms | The second-best treatment window of the year, after fall |
| Set up hoses and sprinklers | Late May | Summer watering starts soon; be ready before the first dry week |
Frequently Asked Questions
When should I fertilize my lawn in Wisconsin?
The first application goes down around Memorial Day, per UW-Extension timing. The follow-ups land around July 4, skipped if the weather is hot and dry, and Labor Day.
When is it safe to plant annuals in Sheboygan County?
After the last frost, which is usually mid-May inland and a week or two later along the lakeshore. Zone 6a yards near the lake stay cooler in spring, so hold tender plants back until the risk truly passes.
How often should I mow in May?
Weekly at minimum. May is the fastest-growing month of the year in Sheboygan County, and stretching to every other week forces you to remove too much blade at once.
Should I treat creeping charlie in spring or fall?
Fall is the most effective window, but the May bloom is the second-best. If the patches are spreading now, treat them while the plant is flowering rather than waiting all summer.
How much mulch does a typical bed refresh need?
Most Sheboygan County bed refreshes take 3 to 8 cubic yards at a 2-to-3-inch depth. Typical market pricing runs about $75 to $110 per cubic yard installed, depending on the mulch and the access.
Ready for a May that doesn't own your weekends? Request a free quote, call or text (630) 460-7320, or message us on Facebook. We'll keep the rhythm; you enjoy the results.
About Sunny Stripes
Sunny Stripes is a family-owned landscaping company based in Sheboygan, WI, serving homeowners and businesses across Sheboygan County — including Sheboygan, Kohler, the Town of Wilson, Sheboygan Falls, and Plymouth. From weekly mowing, trimming, and edging to garden beds, mulch and rock installs, seasonal cleanups, and commercial grounds care, we handle the details other crews skip. Call or text (630) 460-7320, email carl@sunnystripes.com, or request a quote online. Follow our latest projects on Facebook.