St. Augustine

Maintenance and Fertilizer Guide

Spring

  • Keep St Augustine mowed between 2 and 4 inches. Dwarf types at the lower end, and coarse types such as Floratam at the higher end.
  • Apply pre-emergent herbicide. This will cut down on summer weeds.
  • If you have had insect problem in the past, treat with broad-spectrum insecticide. If you use a granular variety, water the lawn immediately after application to help get it into the soil. Make sure it has control for chinch bugs.
  • Don’t overwater. In the active growing season, St Augustine needs about 1” of water a week, from natural rainfall or irrigation. Too much water can cause fungus.
  • Apply fungicide (if needed). If you have had a fungus or disease in your St Augustine in the past or have quite a bit of shade in the yard, you should apply a systemic fungicide to prevent future outbreaks.
  • Fertilize your lawn (choose your program)
Fertilize your lawn

Summer

  • When mowing, never remove more than 1/3 of the leaf blade at a time. If you need to cut more than 1/3, consider multiple cuts over 3-5 days.
  • Do not over water the grass. St Augustine only needs about 1” of water weekly. Water for longer periods of time, less frequently, and in the early morning hours. Take rainfall into consideration.
  • Fertilize your lawn (choose your program)
Fertilize your lawn

Fall

  • Apply fungicide. This will help the grass enter colder months in healthier condition. If you have had fungus before, you may need multiple applications in affected areas.
  • Treat with broad-spectrum insecticide. If you use a granular variety, water the lawn immediately after application to help get it into the soil. Make sure it offers control for chinch bugs.
  • Mow less in cooler fall months. Leave your St Augustine lawn slightly higher than normal to encourage deeper root growth for winter. Adjust mower settings up one notch.
  • Water less. As temperatures drop grasses don’t need as much irrigation. Too much watering can lead to lawn disease.
  • If you haven’t had past problems with winter weeds, you can forgo herbicide in the fall. If you do get winter weeds, apply a pre-emergent herbicide for prevention.
  • Fertilize your lawn (choose your program)
Fertilize your lawn
  • 2″ – 4″
  • Inches
  • 1 inch
  • per week
  • TOTAL
  • Preventative
  • Fungicide &
  • Insecticide

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