Florida doesn't really have four seasons the way other states do, but your lawn still goes through real changes every few months. Grass in St. Petersburg grows almost year-round, and knowing what to expect each stretch of the year helps you avoid the most common mistakes homeowners make with their yards.

Spring (March through May)

This is when St. Augustine grass wakes up and starts growing fast again after a slower winter. If you let your mowing schedule slide over the cooler months, spring is when you get back to a regular rhythm — usually weekly or every other week, depending on how fast your particular lawn grows.

Spring is also when weeds start coming in strong. A thick, healthy lawn is your best defense here — dense grass simply leaves less room for weeds to take hold in the first place. It's a good time to look closely at any bare or thin patches left over from winter and decide whether they need attention before the summer heat and rain arrive.

Summer (June through September)

Summer in St. Petersburg means heat, humidity, and heavy afternoon rain almost every day. Your grass grows quickly during this stretch, which usually means weekly mowing instead of every other week. Skip a week or two in the middle of summer and you'll notice the difference fast.

This is also peak season for lawn pests like chinch bugs, which love hot, dry, sunny patches of St. Augustine grass. Keep an eye on any areas that seem to be thinning or turning yellow-brown even though it's raining everywhere else — that's often the first sign something other than the weather is going on.

Many cities in Pinellas County, including St. Petersburg, restrict fertilizer containing nitrogen or phosphorus during the summer rainy season to help protect local waterways from runoff. Always check the current local rules before you fertilize during these months — the exact dates can change, so it's worth a quick look rather than assuming last year's schedule still applies.

Fall (October through November)

Growth starts to slow down as temperatures cool off and the daily downpours taper. This is a good window to catch up on anything you fell behind on over the summer, from edging along walkways to trimming shrubs back into shape. Once any summer fertilizer restrictions lift, fall is also a reasonable time to fertilize again before growth slows further into winter.

Winter (December through February)

St. Petersburg winters are mild by most standards, but grass growth does slow way down. You'll likely stretch your mowing schedule out, and your lawn won't need much — if any — fertilizer during this stretch. It's still worth mowing occasionally so falling leaves and debris don't smother the grass underneath. Since the lawn itself needs less attention, winter is also a sensible time to handle tree trimming or bigger yard cleanup projects.

A quick year-at-a-glance

Spring: Ramp mowing back up, watch for early weeds, check winter damage
Summer: Mow weekly, watch for chinch bugs in hot/dry patches, check local fertilizer restrictions
Fall: Catch up on edging and trimming, fertilize again once restrictions lift
Winter: Stretch out mowing, skip fertilizer, tackle tree work and cleanup

The bottom line

Your lawn's needs change throughout the year, even though Florida grass never fully goes dormant the way it does farther north. A steady routine that adjusts with the seasons — more mowing in summer, watching closely for pests in the heat, easing off in winter — keeps your yard looking good no matter what month it is.

If you'd rather not track all of this yourself, that's exactly what DemoMowCo handles for you. Reach out to see which plan fits your yard.

Florida Lawn Care by Season: What Your Grass Needs Each Quarter