What does Certified variety mean?
The Oklahoma Crop Improvement Association in cooperation with Oklahoma State University is the official seed and sod certifying agency for Oklahoma. Sod certification is a program that involves verification and purity of specific varieties produced by the sod grower. It certifies to the purchaser that a particular variety is what the grower says it is. Before a variety is certified the field has to be pre-inspected to insure that no other foreign grasses are present to contaminate the variety being planted. The sprigs or stolons then have to originate from a Foundation or Registered source to insure purity. Then the field has to be re-examined by the Oklahoma Crop Improvement Association for final certification. Not all varieties of turfgrass are available for the certification process.
