Mowing
Mow your Cobalt™ Hybrid St. Augustine at a height of 2 inches for the first mow of the spring. Keep it mowed between 2–2.5 inches for the remainder of spring.
Maintenance guide
Cobalt™ Hybrid St. Augustine maintenance guide
Mowing, watering, feeding and protecting your lawn through spring, summer and fall.
Spring
Watering
Don't overwater. In the active growing season, Cobalt Hybrid St. Augustine needs about one inch of water per week from natural rainfall or irrigation.
Fertilization
Fertilize your lawn.
Insect Control
Apply a broad-spectrum insecticide to prevent spring insects from appearing or to control any current spring insects like chinch bugs or white grubs.
Fungus Control
Apply a systemic fungicide at a preventive rate to keep disease from taking hold of your lawn. If you see circular patches of brown or dead grass, do not apply fertilizer until you've applied a systemic fungicide at a curative rate and your grass has recovered.
Summer
Mowing
Cobalt Hybrid St. Augustine mowing heights during the summer range from about 2–2.5 inches. Never remove more than ⅓ of the leaf blade at a time.
Watering
Do not overwater the grass. Cobalt Hybrid St. Augustine only needs about one inch of water weekly. Water for longer periods of time, less frequently, and in the early morning hours.
Fertilization
Fertilize your lawn.
Weed Control
It is not recommended that you apply an herbicide at this time — when temperatures exceed 85°F, the herbicide will damage the grass.
Insect Control
Watch out for chinch bugs, grub worms, mole crickets, sod webworms, fall armyworms and nematodes. Apply a broad-spectrum insecticide to prevent or treat any insects.
Fungus Control
Apply a systemic fungicide if needed.
Fall
Mowing
During the fall, mowing will occur less often. Keeping your Cobalt Hybrid St. Augustine slightly higher will encourage deeper root growth for winter.
Watering
Water less as temperatures drop — too much water will lead to disease.
Fertilization
Fertilize your lawn.
Weed Control
Apply pre-emergent herbicides to control winter weeds. Apply post-emergent herbicides only when weeds are present.
Insect Control
Check for and control any sod webworms, fall armyworms or white grubs. Treat with an insecticide if needed.
Fungus Control
Apply a fungicide at preventive rates — this will help the grass enter the colder months in healthier condition. If you see circular patches of brown or dead grass, do not apply fertilizer until you've applied a systemic fungicide at a curative rate and your grass has recovered.
Need a hand?
Questions about your Cobalt™ Hybrid St. Augustine?
Our team and consulting agronomist are happy to help diagnose problems or recommend products — many are available at Sodmasters Landscape Center.