St. Augustine Grass Care in Orlando: The Complete Central Florida Guide

St. Augustine grass is the dominant turfgrass across Orlando and most of Central Florida for good reason. It handles the combination of intense summer heat, high humidity, seasonal flooding, and sandy soil better than almost any alternative. It produces the lush, dense green appearance that most Florida homeowners want, and it tolerates the partial shade that makes life difficult for other warm-season grasses.

But St. Augustine in Orlando requires specific care that differs from what this grass needs in other markets. The subtropical climate, OUC irrigation restrictions, Central Florida’s sandy soil, and the year-round growing season all create a maintenance program that is distinct from generic lawn care advice. This guide covers what St. Augustine actually needs in Orange County.

Mowing: The Year-Round Schedule

In Orlando, St. Augustine never fully stops growing. The rainy season from June through September produces the fastest growth, often requiring weekly mowing to maintain proper height. During the dry winter months from November through March, growth slows significantly and bi-weekly or even monthly mowing may be adequate depending on rainfall. There is no true dormant season in Central Florida the way there is further north.

The University of Florida IFAS Extension recommends maintaining St. Augustine at 3.5 to 4 inches in Central Florida. This height promotes deeper root development in sandy soil, shades the ground to reduce moisture loss between irrigation cycles, and helps the turf compete against weeds. Cutting below 3 inches exposes the soil surface to direct sun, accelerates evaporation, and creates conditions favorable to chinch bug infestation.

Fertilization on Sandy Soil

Orlando’s sandy soil is the single biggest challenge for St. Augustine fertilization. Nutrients — especially nitrogen — leach through sand much faster than they do through clay or loam soils. A quick-release nitrogen fertilizer applied to sandy soil can wash through the root zone in a single heavy rainstorm, providing almost no benefit to the turf and potentially contaminating groundwater.

Use slow-release nitrogen formulas that extend nutrient availability over 8 to 12 weeks. Apply 2 to 4 pounds of nitrogen per 1,000 square feet per year, split into 3 to 4 applications. The best application timing for Orlando is March, May, September, and optionally November. Avoid fertilizing during the peak rainy season in July and August — heavy daily thunderstorms will wash most of the application away before the grass can use it.

Irrigation Under OUC Restrictions

St. Augustine in Orlando needs approximately 0.5 to 0.75 inches of water per week during the dry season. Under OUC’s two-day-per-week watering schedule during Daylight Saving Time, that means delivering 0.25 to 0.375 inches per session — achievable with a properly calibrated irrigation system in 20 to 30 minutes per zone.

The most common irrigation mistake Orlando homeowners make is overwatering. Running sprinklers for 45 to 60 minutes per zone on sandy soil does not produce a greener lawn — it saturates the root zone, promotes shallow root development, and creates ideal conditions for brown patch and take-all root rot, two fungal diseases that thrive in wet Central Florida conditions.

Pest Management: Chinch Bugs

Chinch bugs are the primary insect threat to St. Augustine grass in Orlando. They feed by piercing grass blades and injecting a toxin that causes yellowing and death. Damage typically appears first in the hottest, driest areas of the lawn — along sidewalks, driveways, and south-facing slopes where the turf is most stressed.

Early detection is critical. Look for irregular patches of yellowing grass that do not respond to irrigation. Part the grass at the edge of a damaged area and look for small black-and-white insects moving at the soil surface. If chinch bugs are confirmed, targeted treatment with bifenthrin or other labeled products is effective when applied early. Preventive treatments in May and July can reduce the risk of significant damage during the peak summer stress period.

For professional St. Augustine grass care in Orlando, contact Orlando Pro Landscape at (407) 555-0100.