WAC 16-302-385

Grass seed standards for certification.

The seed standards for grass shall be as follows:
SEED STANDARDS
CROP AND TYPE OF
REPRODUCTION AS PER
MINIMUM % GERM (d)(n)
MINIMUM % PURE
MAXIMUM % INERT
MAXIMUM % WEEDS (b)
MAXIMUM % OTHER CROPS
MAXIMUM SEEDS OF OTHER CROP GRASS SPECIES
A Apomictic
C Cross Pollinated
S Highly Self Fertile
FNDT. REG.
CERT.
FNDT. REG.
CERT.
FNDT. REG.
CERT.
FNDT. REG.
CERT.
FNDT. (i)
REG. (i)
CERT. (a)
FNDT. SEEDS/
lb.
REG. SEEDS/
lb.
CERT. %
BLUEGRASS
Big
Canby
Kentucky
Canada & Upland
Rough
(A)
(A)
(A)
(A)
(A)
70
70
80
80
75
70
70
80
80
75
90
90
97
96
95
90
90
97
92
95
10
10
3
4
5
10
10
3
8
5
0.05
0.05
0.05
0.05
0.30
0.30
0.30
0.30
0.30
0.30
0.10
0.10
0.10
0.10
0.10
0.50
0.50
0.50
0.50
0.50
45/lb.
45/lb.
45/lb.
45/lb.
45/lb.
454/lb.
454/lb.
454/lb.
907/lb.
454/lb.
0.25
0.25
0.25
0.25
0.25
BROMEGRASS
Smooth & Meadow
California, Mountain &
Sweet
(C)
(C)
80
85
85
85
95
95
95
95
5
5
5
5
0.05
0.30
0.30 (c)
0.30 (c)
0.10
0.10
0.50
1.0
9/lb.
9/lb.
91/lb.
91/lb.
0.25
0.25
DEERTONGUE
(C)
50
50
97
95
3
5
0.50
0.50 (c)
1.0
1.0
1%
-
-
FESCUE
Tall & Meadow
(C)
80
85
95
97
5
3
0.03
0.30 (c)
0.10
0.50
18/lb.
91/lb.
0.25
Blue, Hard &
Sheep (m)
Turf Type (o)
Reclamation/Range
Type (o)
(C)
80
80
85
85
95
95
97
92
5
5
3
8
0.03
0.03
0.30 (c)
0.30 (c)
0.10
0.10
0.50
0.50
9/lb.
9/lb.
45/lb.
45/lb.
0.25
0.25
Chewings Red,
Idaho and other
Fescue
(C)
80
90
95
97
5
3
0.03
0.30 (c)
0.10
0.50
9/lb.
45/lb.
0.25
ORCHARDGRASS
(C)
80
85
92
92
8
8
0.03
0.30 (c)
0.10
0.50
27/lb.
91/lb.
0.25
 
 
 
80 for penlate & latar
 
 
 
 
 
 
 
 
 
RYEGRASS
Pennfine
(C)
85
80
90 (l)
85
96 (k)
96 (k)
97 (k)
97 (k)
4
4
3
3
0.10
0.10
0.30 (c)
0.30 (c)
0.10
0.10
0.50
0.50
9/lb.
9/lb.
45/lb.
45/lb.
0.25
0.25
TIMOTHY
 
80
85
97
97
3
3
0.10
0.30
0.10
0.50
9/lb.
45/lb.
0.25
WHEATGRASS
Beardless
Bluebunch & Snake River
(C)
(C)
80
80
85
85
90
90
90
90
10
10
10
10
0.10
0.10
0.30 (c)
0.30 (c)
0.10 (e)
0.10 (e)
0.50 (e)
0.50 (e)
9/lb.
9/lb.
45/lb.
45/lb.
25
25
Intermediate, Tall
Pubescent
(C)
80
85
95
95
5
5
0.10
0.30 (c)
0.10 (e)
0.50 (e)
9/lb.
45/lb.
0.25
Western, R/S,
Streambank,
Thickspike (p)
(C)
80
85
90
90
10
10
0.10
0.30 (c)
0.10 (e)
0.50 (e)(p)
9/lb.
45/lb.
0.25
Slender
Crested & Siberian
(S)
(C)
80
80
85
85
90
90
95
95
10
10
5
5
0.10
0.10
0.30 (c)
0.30 (c)
0.10 (e)
0.10 (e)
0.50 (e)
0.50 (e)
9/lb.
9/lb.
45/lb.
45/lb.
0.25
0.25
INDIAN RICEGRASS
(S)
80 (j)
80 (j)
95
90
5
10
0.30
0.50
0.50
1.0
9/lb.
45/lb.
0.25
PUCCINELLIA
distans Alkaligrass
(C)
80
80
90
95
5
5
0.30
0.50
0.50
1.0
45/lb.
454/lb.
0.25
WILDRYE
(C)
80
80
90
90
10
10
0.10
0.30 (c)
0.10
0.50
9/lb.
45/lb.
0.25
BENTGRASS
(C)
85
85
98
98
2
2
0.30
0.40 (f)(g)
0.20
0.60 (h)
-
-
-
REDTOP
(C)
80
80
92
92
8
8
0.30
0.50 (f)
0.50
0.20
-
-
-
Ann.
CANARYGRASS
(C)
85
85
99
99
1
1
0.10
0.30
1/lb.
3/lb.
-
-
-
HAIRGRASS
Slender
Tufted
(C)
75
70
92
90
8
10
0.30
0.60
0.10
0.50
-
-
-
BERMUDAGRASS
(C)
-
80
-
97
-
3
-
0.20
-
0.25
-
-
-
GREEN NEEDLEGRASS
(C)
80
80
80
80
20
20
0.10
0.30
0.10
0.50
-
-
-
SWITCHGRASS
(C)
60
60
90
90
10
10
0.50
1.50
0.10
0.25
-
-
-
The following (a) - (p) are notes to the above table.
(a)
Not to exceed 0.25% other grass species for blue tag seed.
(b)
Grass seed must not contain more than 45/lb. for registered seed 91/lb. for certified seed, singly or collectively, of objectionable weed seeds. (See (f) of this subsection for certified bentgrass and redtop exemption.) Grass seed shall be free of the seed of prohibited noxious weeds.
(c)
A tolerance of 0.50% may be allowed for samples containing weedy Bromus spp. provided the total of all other weed seeds does not exceed 0.30%.
(d)
A standard tetrazolium (two hundred seed) test may be used in lieu of germination test. NOTE: State and federal seed laws require seed be labeled on a germination test.
(e)
A tolerance of 0.80% may be allowed in registered and certified wheatgrass containing small grain seed provided the total of all other crop seed does not exceed 0.10% for registered class and 0.50% for certified class.
(f)
Certified seed must not contain over 907 seeds per pound, singly or collectively, of the following weeds: Plantago spp., big mouse-ear chickweed, yarrow, spotted cat's ear, and dandelion.
(g)
A maximum of 0.50% weed seed may be allowed in certified bentgrass containing silver hairgrass provided the total of all other weed seed does not exceed 0.40%.
(h)
1.50% other fine bentgrasses and 0.50% redtop may be allowed in certified bentgrass containing a minimum of 98% total bentgrass.
(i)
A crop exam is required for all registered and foundation class grass seeds.
(j)
Or 70% by Tz test.
(k)
Maximum other ryegrass allowed as determined by fluorescence test: Foundation 0.10%, registered 1%, certified 2% for annual and 3% for perennial containing a minimum of 97% total ryegrass. Acceptable fluorescence levels for specific varieties available upon request.
(l)
85% minimum germination allowed on ryegrass varieties as designated by the breeder or variety owner. See list maintained by the seed program.
(m)
An ammonia test is required on hard, Idaho, blue and sheep fescue to determine presence of other Festuca sp. Other fine-leaved fescue found in the ammonia test will be included with other crop not other grass species.
(n)
Total viability as allowed in WAC 16-302-170 can be substituted for germination percentage.
(o)
Turf type fescues 97% pure seed. Range/reclamation types 92% pure seed. Varietal designation of turf or range/reclamation types is to be made by the breeder or variety owner. If no designation is made, the variety will be considered a turf type.
(p)
10% slender wheatgrass is allowed in the certified class of Critana and 5% Elymus species allowed in the certified class of Schwendimar, provided that the total of all other grass species does not exceed 0.25% and total other crop, including all other grass species does not exceed 0.50%.
[Statutory Authority: RCW 15.49.005, 15.49.081, 15.49.310, 15.49.370(3), and chapter 34.05 RCW. WSR 14-20-050, § 16-302-385, filed 9/25/14, effective 10/26/14. Statutory Authority: RCW 15.49.301, 15.49.370(4), and chapter 34.05 RCW. WSR 11-06-023, § 16-302-385, filed 2/24/11, effective 3/27/11. Statutory Authority: Chapters 15.49 and 34.05 RCW. WSR 10-04-029, § 16-302-385, filed 1/26/10, effective 2/26/10. Statutory Authority: RCW 15.49.310 and chapter 34.05 RCW. WSR 06-15-139, § 16-302-385, filed 7/19/06, effective 8/19/06. Statutory Authority: RCW 15.49.310, 15.49.370(3) and chapter 34.05 RCW. WSR 04-08-044, § 16-302-385, filed 3/31/04, effective 5/1/04. Statutory Authority: Chapters 15.49 and 34.05 RCW. WSR 03-18-072, § 16-302-385, filed 8/29/03, effective 9/29/03; WSR 02-12-060, § 16-302-385, filed 5/30/02, effective 6/30/02. Statutory Authority: RCW 15.49.005, 15.49.081, 15.49.310, 15.49.370(3) and chapter 17.24 RCW. WSR 00-24-077, § 16-302-385, filed 12/4/00, effective 1/4/01.]