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Sod quality seed
OAR 603-56-145 table 1
Kind Minimum
purity
Minimum germination
Maximum * 1 other crop
Maximum * 5 weed
perennial ryegrass
98 % 90 %
0.10 % *2
0.02 %
marion Kentucky bluegrass
95 %
80 %
0.10 % *3
0.02 %
other varieties of bluegrass
97 %
80 %
0.10 % *3
0.02 %
red fescue 98 %
90 %
0.10 %
0.02 %
chewings fescue 98 %
90 %
0.10 %
0.02 %
hard fescue 98 %
85 %
0.10 %
0.02 %
sheep fescue 98 %
85 %
0.10 %
0.02%
blue fescue 98 %
85 %
0.10 %
0.02 %
bentgrass
98 %
85 %
0.10 % *4
0.10 %
tall fescue
98.5 %
85 %
0.10 %
0.02 %

  1. Must be free of ryegrass, orchardgrass, timothy, bentgrass, big bluegrass, poa trivialis, smooth bromegrass, reed canary grass, tall fescue, and clover. (When the base sample is one of these kinds, the species will not be considered a contaminant; i.e., ryegrass in ryegrass.)
  2. Certification fluorescence levels and appropriate calculation will be applied when determining levels of other crop.
  3. Maximum other varieties of Kentucky bluegrass allowed is 2%; maximum allowed Canada bluegrass is 0.02%.
  4. A 500-seed count wil be used to determine other species of Agrostis.
  5. Must be free of dock - Rumex spp., chickweed - Cerastium spp., and Stelloria media, crabgrass - Digitaria spp., plantain - Plantago spp., black medic - Medicago lupulina, annual bluegrass - Poa annua, velvetgrass - Holcus spp., Downy Brome - Bromus tectorum, and other "All-state" noxious weed seeds, except Hawaii.