Lawn fertilization, herbicide treatments, and year-round weed control in Jacksonville and NE Florida. Licensed applicators. Free quotes on YardLink.
Find Fertilization & Weed Control Pros Near YouA proper fertilization and weed control program is the foundation of a healthy lawn in Northeast Florida. The region's warm-season grasses — St. Augustine, Zoysia, and Bermuda — have specific nutrient needs that vary through the year, and getting the timing and product selection wrong can cause more harm than good. Florida's strict environmental regulations around fertilizer use also make it important to work with a licensed applicator who understands the rules.
Florida enacted a state Fertilizer Law that restricts nitrogen and phosphorus applications, and Duval County and St. Johns County have local ordinances that further restrict fertilizer use during the summer rainy season (June 1–September 30). During this blackout period, nitrogen fertilizers with quickly available nitrogen are prohibited to prevent nutrient runoff into the St. Johns River and coastal waterways. Licensed lawn care applicators know these rules and schedule treatments accordingly.
The standard NE Florida lawn fertilization calendar starts in March–April with an application of a slow-release nitrogen fertilizer as St. Augustine and other warm-season grasses break winter dormancy. A second application follows in May (pre-rainy season), with additional treatments in September–October after the rainy season ends. Micronutrient applications — particularly iron and magnesium, which wash out of NE Florida's sandy soils — keep grass deep green throughout the growing season without adding nitrogen.
Pre-emergent herbicide applications are critical in NE Florida's weed calendar. Annual grassy weeds like crabgrass and doveweed germinate when soil temperatures reach 65°F — typically February through March in Jacksonville. Applying pre-emergent before this threshold prevents establishment. Post-emergent treatments for chamberbitter, Florida pusley, spurge, and other summer weeds require selective herbicides appropriate for the grass type — particularly important for St. Augustine, which is sensitive to many common herbicides.
Chinch bug and other lawn pest prevention is often bundled with fertilization programs. NE Florida's hot, dry summer conditions create ideal chinch bug pressure, particularly in St. Augustine lawns adjacent to concrete or in full-sun areas. Broad-spectrum insecticide treatments are typically applied preventively in May–June and September.
A comprehensive annual lawn care program from a licensed NE Florida company typically costs $500–$900 per year for a standard residential lot, covering 5–6 treatment rounds.
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Create Your Business ProfileDuval County and St. Johns County both prohibit applying fertilizers with quickly available nitrogen from June 1 through September 30 — the summer rainy season. This "blackout period" applies to most commercial and homeowner applications. Slow-release and organic fertilizers have different rules. Licensed lawn care companies track these restrictions.
Yellow St. Augustine can indicate iron deficiency (very common in NE Florida's alkaline sandy soils), nitrogen deficiency, chinch bug damage, or fungal disease. Iron chlorosis shows up as yellowing between green leaf veins and is easily corrected with a chelated iron treatment. Bring a sample or photos to a local lawn care pro for a proper diagnosis.
The most troublesome weeds in NE Florida include dollarweed (indicating overwatering or poor drainage), chamberbitter, Florida pusley, doveweed, and common bermudagrass invading St. Augustine turf. Crabgrass and annual bluegrass are common winter weeds. Each requires different herbicide strategies and timing.
Many weed-and-feed products contain herbicides (like atrazine) that are safe for St. Augustine at label rates, but some formulations can damage or kill it. Always check the label for St. Augustine compatibility before applying any herbicide. Licensed applicators select products specifically tested and approved for Florida turf varieties.
Dollarweed (Hydrocotyle species) thrives in wet, overfertilized conditions. Address the root cause first: reduce irrigation frequency, improve drainage, and avoid over-fertilizing. Herbicide treatments with products containing atrazine or metsulfuron are effective in St. Augustine, but cultural fixes are necessary to prevent regrowth.