Tall Fescue

Tall fescue (Festuca arundinacea) is the foundation turfgrass for Middle Tennessee lawns. It is a cool-season bunch-type grass that thrives in our USDA Zone 7a-7b transition zone — one of the most challenging growing environments in the country because we experience both true winter and true summer with long shoulder seasons in between.

Fescue is deep-rooted and genuinely drought-tolerant. Mature tall fescue roots extend twenty-four inches or more into the soil profile, which means the grass can access deep moisture reserves that shallow-rooted grasses cannot reach. Irrigation in Middle Tennessee is not primarily about keeping fescue hydrated — it is a soil temperature control tool. Cool water from an irrigation system, paired with water natural thermal resistance, can keep soil temperatures low enough in gravel-contaminated areas to maintain a good stand of fescue through summer.

The critical challenge for fescue in Middle Tennessee is fungal disease. Our subtropical humidity means plants stay wet for up to twelve hours every day from dew alone. Nighttime temperatures above 75 degrees Fahrenheit from May through August create ideal conditions for brown patch and dollar spot — the two fungal diseases that kill more fescue in our area than anything else. This is why fescue lawn care in Middle Tennessee requires far more inputs than the same grass in Ohio, where four treatments per year can produce a beautiful lawn with no fungicide program at all.

We select our fescue seed cultivars using NTEP (National Turfgrass Evaluation Program) trial data from comparable growing sites — Mississippi, Knoxville, North Carolina, and New Jersey. We pick the best cultivar for each of three growing seasons: spring (green-up, color, weed competition), summer (drought tolerance, brown patch tolerance, insect resistance), and fall (drought tolerance, seedling vigor, gray leaf spot tolerance). Those three cultivars are blended together for year-round performance. We use only sod-quality certified seed with zero tolerance on noxious weed contamination.

Our standard overseeding blend is ninety percent turf-type tall fescue and ten percent Kentucky bluegrass by weight (roughly thirty to thirty-five percent bluegrass by plant count, since bluegrass seed is much smaller). The bluegrass adds lateral spreading capability for self-repair, a disease firebreak against brown patch, and the same structural benefit that makes sod hold together when cut.