Silvana : Hard Fescue

  Sima : Fine Leaved Sheep's Fescue.

  Simone : Chewings Fescue

  Singapore : Perennial Ryegrass

  Sioux : Strong Creeping Red Fescue.

  Sirtaky : Perennial Ryegrass

  Siskin : Chewings Fescue

  Skandia II : Smooth Stalked Meadow Grass.

  Skyfall : Creeping Bent

  Skylar : Chewings Fescue

  Smirna : Slender Creeping Red Fescue

  Snowbird : Rough Stalked Meadow Grass

  Sobra : Smooth Stalked Meadow Grass

  Sodco : Smooth Stalked Meadow Grass.

  Solo : Rough Stalked Meadow Grass

  Sombrero : Smooth Stalked Meadow Grass

  Sommora : Perennial Ryegrass

  Sonnet : Slender Creeping Red Fescue

  Sourire : Perennial Ryegrass

  Splendor : Perennial Ryegrass

  Sport : Fine Leaved Timothy.

  Sportiva : Perennial Ryegrass.

  Springfield : Perennial Ryegrass

  Sprinter : Perennial Ryegrass

  SR 1119 : Creeping Bent

  Stadion : Perennial Ryegrass

  Starlett [1] : Smooth Stalked Meadow Grass

  Starlett [2] : Tall Fescue

  Starling : Perennial Ryegrass

  Steinacher [1] : Chewings Fescue

  Steinacher [2] : Browntop Bent.

  Stolawn : Perennial Ryegrass

  Stormont Causeway : Perennial Ryegrass

  Stravinsky : Perennial Ryegrass

  Sturdy : Perennial Ryegrass

  Sunbright : Perennial Ryegrass

  Sunset : Strong Creeping Red Fescue

  Superstar : Perennial Ryegrass

  Supra : Prostrate Meadow Grass

  Surf : Perennial Ryegrass