Tampa is in USDA Zone 9b. St. Augustine lawns here grow best when fertilized march–october. Here's your complete schedule.
St. Augustine
Best Grass
Zone 9b
Hardiness Zone
March–October
Fertilize
7,500 sq ft
Avg. Lot Size
A year-round fertilization plan for St. Augustine lawns in Zone 9b. Adjust based on your lawn's condition and soil test results.
Early Spring (March)
Apply when soil temps hit 55°F in Tampa. Prevents crabgrass before it germinates.
Late Spring (May)
Your St. Augustine is actively growing now. This is the most important feeding of the year.
Summer (July)
Light feeding only — Tampa's heat and humidity stress the lawn. Water deeply after applying.
Early Fall (September)
Strengthens roots before winter dormancy. Last chance for weed control.
The most common mistake Tampa homeowners make is fertilizing at the wrong time. With St. Augustine, you want to feed during active growth — never in winter when your lawn is dormant.
Before you buy fertilizer, know your lawn size. The average Tampa lot is 7,500 square feet, but that includes your house, driveway, and patio. Use LotSite to measure just the grass area — then plug that number into our fertilizer calculator to get the exact bags you need.
For a 7,500-square-foot lot in Tampa, you'll typically need 2–4 bags of fertilizer per application depending on the product. Over-fertilizing wastes money and can burn your lawn — measuring accurately saves both.
Enter your address to measure your exact lawn area — then get the right amount of fertilizer.