Tall Fescue (clump appearing as a weed in a finer lawn)
Festuca arundinacea (syn. Schedonorus arundinaceus) · Cool-season, Perennial, C3 grass
Grass Family
Poaceae, Subfamily Pooideae, Tribe Poeae
Grass Category
Lawn/Turf, Pasture, and occasionally an Invasive/Weed grass in professional turf
Variety / Cultivar
Likely a 'Kentucky 31' or older forage-type fescue given the coarse texture and bunching habit within this lawn
Hardiness Zones
USDA Zones 4-7; excellent heat tolerance for a cool-season grass, making it the staple of the Transition Zone.
About This Grass
A coarse-textured, deep-rooted grass that forms dense, isolated clumps when not sown as a monolithic lawn. It remains green during cool months but can look ragged and lighter green than surrounding fine-bladed grasses.
Blade Characteristics
Coarse blade width (5-10mm), flat shape with a distinctly pointed tip. Color is typically medium to dark green with prominent longitudinal veins (ribbed) on the upper surface. Vernation is rolled in the bud; auricles are typically small and rudimentary or absent but hairs may be present on the collar margins.
Root System
Deeply fibrous (reaching 2-3 feet depth), allowing for high drought resistance. It does not form a true sod due to its bunch-type habit, making it slow to fill in bare spots without overseeding.
Growing Information
Origin Region
Europe and North Africa; widely naturalized across North America, particularly in the Transition Zone
Growth Habit
Bunch-type (clump-forming); lacks significant rhizomes or stolons, leading to the isolated vertical tufts seen in the image
Sunlight & Water Needs
Full sun to moderate shade (one of the most shade-tolerant cool-season grasses). Requires moderate watering; high drought tolerance once established due to deep roots.
Mowing & Maintenance
Ideal height 2.5 to 4 inches. In this image, it is outgrowing the surrounding turf due to a faster vertical growth rate. Low to medium maintenance; requires 2-4 lbs N/1000 sq ft annually.
Special Characteristics
High wear tolerance, excellent drought resistance, and few major pest problems. However, it is often viewed as a weed in Kentucky Bluegrass or Bermuda lawns because its coarse texture and bunching habit disrupt uniformity.
Ecological Information
Introduced species in North America. Used for erosion control on slopes and as a hardy pasture grass. Often contains endophytes (beneficial fungi) that improve stress tolerance but can be toxic to some livestock.