Kopu II was selected for stolen density, persistence under grazing, high yield, and large leaf size. This was achieved primarily by selection under cattle grazing in the northern United States and sheep grazing in New Zealand.

Kopu II, bred by AgResearch Grasslands of New Zealand, was selected from a world collection of white clovers. Penn State University and the University of Wisconsin participated in the selection and evaluation of the cultivar. In trials in Lancaster, Arlington, and Marshfield, Wisconsin Kopu II has exhibited improved yield and persistence over Alice (known as the industry standard).

Kopu II outperforms or equals Patriot and Durana in most locations in Kentucky for Persistence and Yield.

Other Info

Seeding Rates:
New hay fields/pasture: 1-3 lbs/acre in mixes

Renovation/Overseeding existing fields/pastures:
1-2 lbs/acre for pastures

Method of Seeding:
Use of a Brillion seeder, a no-till drill or a culti-packer is ideal. Frost seeding also works well, especially if the animals are allowed to “hoof” if into the existing pasture. Seed to soil contact is vital to having a successful stand. Take caution to not plant the seed more than 1/4″ deep. For best performance, Kopu II should lightly grazed frequently during establishment.

University of Wisconsin Penn State
Percent Forage Yield Growth Compared to California Ladino Grazing Trial Ave. 1996-99 and 3 grass species
Variety 1996 1997 1998 Variety Yield % of Calif. Ladino  % Clover Stolen Density 
Kopu II 92
137 122 Kopu II 138 25 1683
Calif. Ladino 100 100 100 Will 130 26 1358
Tillman II 129 118 99 Osceola 88 14 986
Will 112 109 86 CA Ladino 100 17 1045
Huia 82 86 88 Merit 101 19 No Data
Tillan II 88 23 No Data
Regal 64 11 No Data
MoSouthernS33dKopu II Ladino White Clover