While fall in Florida doesn’t bring the deep chills seen in other parts of the country, the gradual cool-down signals important lawn changes. Shorter days, lower humidity and cooler evenings mean your grass begins preparing for various stages of dormancy—and your lawn care approach should adjust accordingly.
Whether you’re in North, Central or South Florida, this guide will help your warm season lawn transition smoothly from summer to winter.
Quick Look at What’s Ahead:
- Fall Soil Testing
- Final Fertilization Schedule
- Adjusted Mowing Practices
- Smart Watering Adjustments
- Fall Weed Control (Pre & Post Emergent)
- Fall Pests
- Fall Disease Watch
- Dealing with Leaves
- Overseeding & Lawn Color
- FAQs and Summary
1. Soil Testing in Fall: A Smart First Step
Fall is an ideal time to test your soil. As the growing season winds down, a soil test provides a clear picture of your lawn’s nutrient status heading into dormancy. You’ll gain insight into pH, potassium, phosphorus and micronutrient levels, allowing you to plan effectively for next spring.
👉 Pro Tip: Use SoilKit for simple testing and tailored recommendations based on your exact lawn conditions.
2. Fall Fertilization: Feed for Winter Prep
Timing is everything. The final fertilizer application helps your grass store energy and nutrients for winter survival and spring rebound.
It’s good practice to reduce your nitrogen and increase potassium inputs. Excessive nitrogen in slow-growing lawns can promote disease while higher potassium helps to decrease disease pressure.
Key Regional Cutoffs:
- North Florida: Typically apply by mid-to-late September.
- Central Florida: Last window is typically October.
- South Florida: You may continue fertilizing into November, if needed.
We Recommend:
Lawnifi Fall Fertilizer Box
This liquid program, designed for hose-end application and covering up to 5,000 sq. ft., is tailored to nourish and fortify your lawn after the summer heat.
3. Mowing & Maintenance in Fall
Growth slows in the fall, so mowing frequency decreases—but mowing height still matters. Keeping your warm season lawn slightly higher in the fall encourages deeper root growth, helping the grass endure winter dormancy.
Be sure not to scalp your lawn in the fall as the grass will be slower to recover throughout the winter. Always gradually lower the height of cut (1/3 inch increments) if you want your lawn to be shorter.
| Grass Type | Recommended Fall Height |
|---|---|
| Bermuda | Slightly higher than 0.5–1.5 inches |
| Centipede | Slightly higher than 1.5–2.0 inches |
| St. Augustine | Slightly higher than 2.0–4.0 inches |
| Finer-Bladed Zoysia | Slightly higher than 0.5–1.5 inches |
| Wider-Bladed Zoysia | Slightly higher than 1.0–2.0 inches |
Mowing Tips:
- Keep blades sharp. Dull blades will rip the grass, increasing the chance for pest and disease damage.
- Avoid mowing when grass is wet or dormant.
- Leave clippings unless disease is present.
4. Watering in Fall: Adjust, Don’t Stop
As temperatures drop and rainfall patterns shift, overwatering can become a bigger threat than drought.
Weekly Needs:
- In general, water up to 1 inch per week, including rainfall. Some species require less water and factors such as soil type can also impact water needs.
- Use a rain gauge to track natural irrigation.
- Reduce frequency, but water deeply when needed.
System Check:
- Perform an irrigation audit.
- Clean sprinkler heads and check coverage.
- Install a rain sensor if you haven’t yet.
5. Weed Control Strategies
Pre-Emergent Weed Prevention
Apply before soil temps fall below 70 degrees Fahrenheit or less to prevent weeds like:
- Poa annua (annual bluegrass)
- Chickweed
- Henbit
- Clover
Avoid pre-emergents if you're planning to overseed.
Overseeding Warning: If you plan to overseed, do not use pre-emergents—they will prevent seed germination. Be sure to pay attention to the product label and follow instructions on the timing of overseeding after treatment.
Post-Emergent Treatments
Spot treat actively growing weeds as needed. Spring and summer weeds that are not treated before the fall and winter may lie dormant and emerge the following spring summer.
Common Targets:
- Chickweed
- Henbit
- Clover
- Poa annua
- Dollarweed
- Doveweed
- Nutsedge
- Dandelion
For warm season grasses, use selective post-emergent herbicides and always follow the label directions carefully. If your lawn consists of St. Augustine or centipede grass—both of which are sensitive to many herbicides—opt for Hi-Yield Atrazine to effectively control existing weeds without causing damage.
- SpeedZone Broadleaf Herbicide for broadleaf weeds.
- Drive XLR8 for grassy weeds.
- Hi-Yield Atrazine for centipede & St. Augustine lawns.
6. Fall Pest Watch
Fall pest damage can have long-lasting effects with cooler temps and slower growth.
Pests to Watch For:
- Sod Webworms: Particularly active in early fall. Use NaturalGuard Spinosad to treat.
- Grubs: Feed on roots—look for spongy turf that pulls up easily. Use Dylox to treat.
- Fall Armyworms: Cause rapid defoliation. Use NaturalGuard Spinosad to treat.
- Mole Crickets: Tunnel and uproot grass. Use Bifen XTS or Imidacloprid 0.5G to treat.
- Hunting Billbugs: Damage zoysia and bermuda roots. Use Bifen XTS or Imidacloprid 0.5G to treat.
Detection Tip: To bring pests to the surface, try a soap flush (2 tbsp. dish soap in 1 gal. water). Check out our Insect ID guide for more information.
7. Fall Disease Management
Warm season grasses like St. Augustine, zoysia and centipede are especially prone to large patch disease in fall.
Prevention Tips:
- Avoid late-season nitrogen.
- Water early in the day.
- Improve air flow and drainage.
- Apply preventive fungicides if you’ve had past issues.
Use Azoxystrobin or similar systemic fungicides. Rotate active ingredients to prevent resistance.
8. Fall Leaves: Clear Them Regularly
Fallen leaves can suffocate grass and create disease issues if left too long.
- Rake or mulch weekly.
- Avoid leaving piles in shaded areas.
- Compost leaves or use them as mulch in garden beds.
9. Bare Spots? Try Overseeding or Turf Colorants
Overseeding (North & Central Florida):
- Helps fill in thin areas and maintain winter color.
- Use compatible seed blends (like ryegrass) for seasonal coverage.
- This should only be done for bermuda grass lawns.
Turf Colorants (Statewide):
- For a green look without overseeding.
FAQs
Q: Can I fertilize in November in North Florida?
A: No—cutoff is mid-to-late September. Late feeding can trigger frost-sensitive growth.
Q: Is fall a good time to aerate?
A: Only if the grass is still actively growing. Otherwise, wait until spring.
Q: Can I stop mowing completely in fall?
A: No, but frequency will drop. Continue as needed, following the height guidelines.
Fall Lawn Care Checklist for Florida:
- Soil Test for nutrient levels.
- Apply final fertilizer by regional deadline.
- Adjust mower height to encourage root strength.
- Water wisely—deep and infrequent.
- Apply pre-emergent to block winter weeds.
- Treat visible weeds with post-emergent herbicide.
- Scout for pests—address early.
- Prevent fungal disease with good cultural practices.
- Remove leaves weekly.
- Consider overseeding or turf colorant for winter green.
