All of the following are cool-season grasses except which?

• A. Kentucky Bluegrass
• B. Zoysia Grass
• C. Fine Fescue
• D. Perennial Ryegrass

Answer: (B)

Grasses are grouped by the temperatures they grow best in. Cool-season grasses thrive in cooler spring and fall temps and stay green through those cool periods, while warm-season grasses push growth in hot weather and often brown off in cold winter months. Among common garden grasses, Kentucky bluegrass, fine fescue, and perennial ryegrass are all cool-season types—they grow vigorously in cooler temperatures and are well suited to climates with cold winters. The one that doesn’t fit this group is the warm-season grass, which loves heat, tolerates drought, and often goes dormant and turns brown when temperatures drop. So the exception here is the warm-season grass, Zoysia, which is not a cool-season grass.