A lawn full of weeds usually has a cause behind it, and the weed is the clue. The UF/IFAS guide Reading the Weeds says weeds point to the real problem: clover means low nitrogen, annual bluegrass and chickweed mean mowing too low, and Florida pusley and spurges may mean nematodes. So the first job is to name the weed, not to spray the whole yard. A weedy lawn is not urgent, so there is time to find the cause before anyone treats it.
When dandelions, clover and other weeds are taking over the lawn, there is also a replace-or-repair line to know about. UF/IFAS Extension Hillsborough County says to replace a lawn when 30% or more of it is weeds, bare spots or damage. Your Tampa price comes from a written price after the crew comes out and measures your yard.
What the weeds in your lawn are telling you
Dandelions in lawn: start with the name
The Washington State University (WSU) Extension home lawn guide names dandelion, plantain, clover, speedwell, buttercup and annual bluegrass as lawn weeds. It says overwatering and nitrogen flushes encourage several of them, and it says to identify the weed first. In Tampa, weigh that against the once-a-week watering day and the June 1 to September 30 rule on nitrogen and phosphorus fertilizer below.
Clover in grass: low nitrogen
UF/IFAS says clover means low nitrogen. In Tampa, that clue comes with a rule. Lawn and landscape fertilizer with nitrogen or phosphorus may not be applied from June 1 to September 30, according to the City of Tampa. UF/IFAS also says North and Central Florida soils are typically very sandy and do not hold water or nutrients well. If clover is spreading in summer, hold off on any fertilizer with nitrogen or phosphorus until the window ends on September 30. Ask what feeding plan fits the calendar.
Annual bluegrass and chickweed: mowing too low
UF/IFAS reads annual bluegrass and chickweed as a sign of mowing too low. Its mowing rule is never to cut more than a third of the blade at once. UF/IFAS adds that bahiagrass is mowed to 3 to 4 inches. Ask how low your mower deck sits before you ask about any weed treatment.
Dollarweed, sedges, doveweed and eclipta: soggy soil
UF/IFAS says dollarweed usually means overwatering or a naturally wet spot. The fix it gives is to adjust watering or improve drainage, then hand-pull the weed with all the white rhizomes or use a labelled herbicide. It says sedges, doveweed, dollarweed and eclipta point to soggy soil, and that they may signal a sprinkler leak or poor drainage. The fixes it lists are adding soil to raise the spot, a new drain to divert water, or a rain garden.
WSU adds a simple test from its general guide: if surface water has not drained 2 or 3 hours after rain or watering, the yard has a drainage problem. Tampa gets 49.48 inches of rain a year, according to NOAA climate normals. See our page on standing water in the yard for the drainage side.
Goosegrass and Florida pusley: compaction and nematodes
UF/IFAS says goosegrass is a sign of compacted soil. Compaction usually comes from heavy foot or vehicle traffic and is common around newly built homes. UF/IFAS Extension Hillsborough County says urban development in Tampa and Hillsborough County often leaves compacted, nutrient-poor sandy soil. A quick check from UF/IFAS: if you struggle to push a tool more than a few inches into the soil, the root zone is likely compacted, which leads to shallow roots and poor drainage. The listed fixes are tilling, plug aeration, air tilling and adding compost, and the right one depends on how compacted the soil is and the budget. Our compacted lawn soil guide goes through them.
Florida pusley and spurges may point to nematodes, UF/IFAS says. Ask any company how it would confirm nematodes before treating.
Checklist
What to check before anyone treats the lawn
Check your watering
UF/IFAS FAWN says 1/2 to 3/4 inch of water a week is generally the most a home lawn or landscape needs in the hottest part of the year. That is a ceiling, not a target. It also says that after 0.3 inch of rain in 24 hours, or 1 inch in 3 days, irrigation may not be needed that day. The rainy season runs from May 25 to October 10 in the Tampa Bay area, according to the National Weather Service, so ask whether your sprinklers still run on a fixed timer through it.
Tampa water customers may water lawns once a week, on a day set by the last digit of the house number: 0-1 Monday, 2-3 Tuesday, 4-5 Wednesday, 6-7 Thursday, 8-9 Friday. Watering is allowed only from midnight to 4 a.m. or 8 p.m. to 11:59 p.m. Breaking the rules can bring fines up to $500 and a mandatory court appearance. The one-day-a-week order runs until March 31, 2027, and it applies to homes on private wells too.
Get a soil test
UF/IFAS lists a soil test through the county Extension office as part of lawn site prep. It says the median Florida soil pH is 6.1, slightly acidic, and that most plants take up nutrients best between pH 6 and 7. Amend the soil only when a test shows a need. A lawn soil test runs $35 to $100 in national cost guides.
Rules that apply while you work on it
Beyond the June 1 to September 30 fertilizer window, no fertilizer may go within 10 feet of water under the Hillsborough County Environmental Protection Commission rule that applies in Tampa. Grass clippings, fertilizer and yard waste may not be blown or placed into the street in Tampa. Hand watering of lawns follows your designated day. Reclaimed water used for irrigation is generally not subject to the watering restrictions, though customers must still avoid wasteful use.
Patch, treat or replace a lawn full of weeds
When a weedy lawn is past patching
The Hillsborough County Extension office draws the line at 30% of the lawn: replace it when that much is weeds, bare spots or damage. Below that line, fix the cause first. UF/IFAS advises checking the sprinklers for missed or overwatered spots before patching dead areas, and looking for insects or disease. Where damage is extensive, UF/IFAS suggests replacing those areas with a different grass or another plant rather than patching.
Who can apply weed treatment
In Florida, anyone applying pesticide to lawns for hire must hold their own FDACS certification or work under a licensed Lawn and Ornamental operator. A Commercial Landscape Maintenance card covers plant beds, not turf. Ask who will apply any weed or pest treatment and which state licence they hold. Anyone applying commercial fertilizer to a Florida yard for pay must also hold the state limited urban landscape fertilizer certification.
How a full replacement is done
Hillsborough County Extension says never to lay sod over existing weeds and grass; remove or kill them first. The UF/IFAS planting guide lists the site prep: clear debris, roots and rocks, kill and remove the old grass, get a soil test through the county Extension office, and grade the soil to slope away from the house. Tampa Landscaping Pros does this work in Tampa yards: our crew removes the old grass and weeds, prepares and grades the soil, and lays the new sod. The Hillsborough County guide adds these details:
- Rototill compacted soil 6 to 8 inches deep before laying sod.
- Grade the lawn 1% to 2% away from buildings or toward drains, and avoid slopes steeper than 3 to 1.
- Aim for a soil pH of 6.5 to 7.5 for new sod, with about 5% organic matter.
St. Augustinegrass and zoysiagrass are planted as sod or plugs. Bahiagrass and bermudagrass are the best Florida lawn grasses to start from seed, and the best time to seed warm-season grass in most of Florida is April to July. UF/IFAS says bahiagrass has better drought tolerance than other Florida lawn grasses and is chosen for relatively low upkeep and fewer nutrients. Zoysiagrass tolerates shade, salt and traffic well, with slow growth and a tendency to build thatch.
Watering and mowing after the new lawn goes in
UF/IFAS advises light, frequent watering for the first 2 to 3 weeks, keeping the soil moist but not soggy, then tapering off once the sod roots. In Tampa, new sod still may not be watered between 4 a.m. and 8 p.m., and the city points to the UF/IFAS 30-day establishment schedule, then normal days apply. Wait 3 to 4 weeks before the first mow and 30 to 60 days before fertilizing. If the sod goes down in late spring or summer, that wait runs into the fertilizer window noted above.
Cost
What it costs
National ranges from 2026 cost guides:
| Item | National range |
|---|---|
| Removing weeds and old grass, disposal included | $0.88 to $1.84 per square foot |
| Tilling and grading before new sod | $0.90 to $2 per square foot |
| Sod material only | $0.31 to $0.82 per square foot |
| Sod installed, average | $1.65 per square foot |
| St. Augustine sod installed | $0.98 to $1.79 per square foot |
| Professional sod install on a 1,000-square-foot yard, old grass removal not included | $1,000 to $2,200 |
| Lawn soil test | $35 to $100 |
What moves the price: how much of the lawn is weeds, whether the old grass has to come out, how much tilling and grading the soil needs, and the grass you choose. Ask for a written, itemized price after the crew walks your Tampa yard and measures it. For the full picture, see our cost guide for Tampa landscaping. Tampa Landscaping Pros pulls the City permit when the job needs one.
Questions about a lawn full of weeds
Why is my lawn full of weeds?
UF/IFAS says weeds point to the real problem: clover means low nitrogen, annual bluegrass and chickweed mean mowing too low, and wet-soil weeds such as dollarweed point to overwatering or poor drainage. Name the weed first.
How do I get rid of clover in grass?
UF/IFAS reads clover as low nitrogen. In Tampa, nitrogen or phosphorus fertilizer may not be applied from June 1 to September 30, so ask what feeding plan fits the calendar before you buy a product.
Why do I have so many dandelions in my lawn?
WSU names dandelion as a lawn weed and says overwatering and nitrogen flushes encourage several lawn weeds. Check how much water and fertilizer the lawn gets, within Tampa's watering and fertilizer rules.
Should I replace the lawn or keep treating it?
Count the share of the lawn that is weeds, bare spots or damage. At 30% or more, the Hillsborough County Extension advice is to replace it. Never lay sod over existing weeds and grass.
Who can spray weeds on my lawn for pay?
Florida requires a for-hire lawn applicator to hold an FDACS certification or work under a licensed Lawn and Ornamental operator. Ask who will apply any weed or pest treatment and which state licence they hold.
How much does it cost to replace a weedy lawn with sod?
In 2026 national guides, sod installed averages $1.65 per square foot, and a professional install on a 1,000-square-foot yard runs $1,000 to $2,200 with old grass removal not included. Ask for a written, itemized price after the crew walks your Tampa yard and measures it.
Cost
Get a written price for your lawn
Call us or use the form. We call you back within one business day. The crew comes out and measures, and Tampa Landscaping Pros gives you a written price before any work starts.