Certified Professional Horticulturist (CPH) Practice Exam

Which species of grass is best suited as cool season turf, well adapted to good soil in full sun?

1. Fine fescue

2. Bermuda grass

3. Turf type fine fescue

4. Kentucky Bluegrass

The correct answer is: Kentucky Bluegrass

Kentucky Bluegrass is an outstanding choice for cool season turf, particularly in full sun and well-drained soils. This grass species thrives in cooler temperatures and benefits from the moisture typically found in early spring and fall. Its ability to produce a dense, lush lawn makes it highly desirable for residential and recreational areas. Kentucky Bluegrass has a robust root system that allows it to tolerate drought periods better than some other cool-season grasses, enhancing its adaptability. Additionally, the grass spreads through underground rhizomes, which helps it recover from wear and tear, making it a reliable option for turf applications. While Fine fescue and Turf type fine fescue are suited for shaded areas and have fine textures, they do not exhibit the same vigor and resilience in direct sunlight compared to Kentucky Bluegrass. Bermuda grass, on the other hand, is typically classified as a warm season grass, thriving in higher temperatures and full sun environments, making it less suitable for the cool season conditions described.