Specific germination requirements are set forth in table 2 to which the following paragraphs (a), (b), and (c) are applicable.
B = between blotters
TB = top of blotters
T = paper toweling, used either as folded towel tests or as roll towel tests in horizontal or vertical position
S = sand or soil where soil is an artificial planting mix of shredded peat moss, vermiculite, and perlite
TS = top of sand or soil
P = covered Petri dishes: with two layers of blotters; with one layer of absorbent cotton; with five layers of paper toweling; with three thicknesses of filter paper; or with sand or soil
C = creped cellulose paper wadding (0.3-inch thick Kimpak or equivalent) covered with a single thickness of blotter through which holes are punched for the seed that are pressed for about one-half their thickness into the paper wadding
TC = on top of creped cellulose paper without a blotter
RB = blotters with raised covers, prepared by folding up the edges of the blotter to form a good support for the upper fold which serves as a cover, preventing the top from making direct contact with the seeds.
Table 2-Germination Requirements for Indicated Kinds
Name of seed | Substrata | Temperature (°C) | First count days | Final count days | Additional directions | |
Specific requirements | Fresh and dormant seed | |||||
AGRICULTURAL SEED | ||||||
Agrotricum | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days. | |
Alfalfa | B, T, S | 20 | 4 | 17 | See ¶ (b)(11) | |
Alfilaria | B, T | 20-30 | 3 | 14 | Clip seeds | |
Alyceclover | B, T | 35 | 4 | 121 | See ¶ (b)(1) for swollen seeds | |
Bahiagrass: | ||||||
Var. Pensacola | P, S | 20-35 | 7 | 28 | Light; see ¶ (b)(2) | See § 201.57a |
All other vars. | P | 30-35 | 3 | 21 | Light; remove glumes; see ¶ (b)(2) | Scratch caryopses; KNO3; see § 201.57a |
Barley | B, T, S | 20; 15 | 4 | 7 | Prechill 5 days at 5 or 10 °C or predry | |
Barrelclover | B, T | 20 | 4 | 114 | Remove seeds from bur; see ¶ (b)(11) | |
Bean: | ||||||
Adzuki | B, T, S | 20-30 | 4 | 110 | ||
Field | B, T, S, TC | 20-30; 25 | 5 | 18 | ||
Mung | B, T, S | 20-30 | 3 | 17 | ||
Beet, field | B, T, S | 20-30 | 3 | 14 | See ¶ (b)(3) | |
Beet, sugar | B, T, S | 20-30; 20 | 3 | 10 | See ¶ (b)(3) | |
Beggarweed, Florida | B, T | 30 | 5 | 128 | ||
Bentgrass: | ||||||
Colonial | P | 15-30; 10-30; 15-25 | 7 | 28 | Light; KNO3 | Prechill at 5 or 10 °C for 7 days. |
Creeping | P | 15-30; 10-30; 15-25 | 7 | 28 | Light; KNO3 | Prechill at 5 or 10 °C for 7 days. |
Velvet | P | 15-25; 20-30 | 7 | 21 | Light; KNO3 | |
Bermudagrass | P | 20-35 | 7 | 21 | Light; KNO3; see ¶ (a)(9) | |
Bermudagrass, giant | P | 20-35 | 7 | 21 | Light; KNO3; see ¶ (a)(9) | Prechill at 10 °C for 7 days and then test at 20-35 °C; continue tests of hulled seed for 14 days and of unhulled seed for 21 days |
Bluegrass: | ||||||
Annual | P | 20-30 | 7 | 21 | Light | |
Bulbous | P, S | 10 | 10 | 35 | KNO3 or soil | Prechill all samples at 5 °C for 7 days. |
Canada | P | 15-25; 15-30 | 10 | 28 | Light; KNO3 | 10-30 °C. |
Glaucantha | P | 15-25; 15-30 | 10 | 28 | Light; KNO3 | |
Kentucky | P | 15-25; 15-30 | 10 | 28 | Light; KNO3 | Prechill at 10 °C for 5 days. |
Nevada | P | 20-30 | 7 | 21 | Light; KNO3 | |
Rough | P | 20-30 | 7 | 21 | Light | |
Texas | P | 20-30 | 7 | 28 | Light; KNO3 | Prechill at 5 °C for 2 weeks. |
Wood | P | 20-30 | 7 | 28 | Light | |
Bluejoint | TB, P | 15-25 | 10 | 21 | Light and KNO3 optional | Prechill at 5 °C for 5 days |
Bluestem: | ||||||
Big | P, TS | 20-30 | 7 | 14 | Light; KNO3 | Prechill at 5 °C for 2 weeks; see § 201.57a . |
Little | P, TS | 20-30 | 7 | 14 | Light; KNO3 | Prechill at 5 °C for 2 weeks; see § 201.57a . |
Sand | P, TS | 20-30 | 7 | 14 | Light; KNO3 | Prechill at 5 °C for 2 weeks; see § 201.57a . |
Yellow | P, TS | 20-30 | 5 | 14 | Light; KNO3 | Prechill at 5 °C for 2 weeks; see § 201.57a . |
Bottlebrush-squirreltail | P, B | 20; 15 | 10 | 14 | See § 201.57a . | |
Brome: | ||||||
Field | P, TB | 15-25; 20-30 | 6 | 14 | Light | Prechill at 10 °C for 5 days. |
Meadow | B, T, TB | 20-30 | 6 | 14 | Light optional | |
Mountain | P | 20-30 | 6 | 14 | Light. | |
Smooth | P, B, TB | 20-30 | 6 | 14 | Light optional | Prechill at 5 or 10 °C for 5 days, then test at 30 °C for 9 additional days. |
Broomcorn | B, T, S | 20-30 | 3 | 10 | ||
Buckwheat | B, T | 20-30 | 3 | 6 | ||
Buffalograss: | ||||||
(Burs) | P,TB,TS | 20-35 | 7 | 14 | Light;KNO3 | Prechill at 5 °C for 2 weeks; See § 201.57a . |
(Caryopses) | P | 20-35 | 5 | 14 | Light;KNO3 | |
Buffelgrass | S | 30 | 7 | 28 | Light; press fascicles into well-packed soil and prechill at 5 °C for 7 days | See ¶ (b)(4); see § 201.57a . |
Burclover, California | B, T | 20 | 4 | 1 14 | Remove seeds from bur; see ¶ (b)(11) | |
Burclover, spotted | B, T | 20 | 4 | 1 14 | Remove seeds from bur; see ¶ (b)(11) | |
Burnet, littler | B, T | 15 | 5 | 14 | ||
Buttonclover | B, T | 20 | 4 | 1 10 | See ¶ (b)(11) | 15 °C. |
Camelina | TB | 20 | 4 | 7 | ||
Canarygrass | B, T | 20-30 | 3 | 7 | ||
Canarygrass, reed | P | 20-30 | 5 | 21 | Light; KNO3 | |
Carpetgrass | P | 20-35 | 10 | 21 | Light | KNO3. |
Castorbean | T, S | 20-30 | 7 | 14 | Remove caruncle if mold interferes with test | |
Chess, soft | P | 20-30 | 7 | 14 | Light | Prechill at 5 or 10 °C for 7 days. |
Chickpea | T,S | 20-30 | 3 | 1 17 | ||
Clover: | ||||||
Alsike | B, T, S | 20 | 3 | 1 7 | See ¶ (b)(11) | 15 °C. |
Arrowleaf | B, T | 20; 15 | 4 | 1 14 | See ¶ (b)(11) | |
Berseem | B, T, S | 20 | 3 | 1 7 | See ¶ (b)(11) | 15 °C. |
Cluster | B, T | 20 | 4 | 1 10 | See ¶ (b)(11) | 15 °C. |
Crimson | B, T, S | 20 | 4 | 1 7 | See ¶ (b)(11) | 15 °C. |
Kenya | B, T, S | 20 | 3 | 17 | ||
Ladino | B, T, S | 20 | 3 | 1 7 | See ¶ (b)(11) | 15 °C. |
Lappa | B, T | 20 | 3 | 1 7 | See ¶ (b)(11) | 15 °C. |
Large hop | B, T | 20 | 4 | 1 14 | See ¶ (b)(11) | 15 °C. |
Persian | B, T | 20 | 3 | 1 7 | See ¶ (b)(11) | 15 °C. |
Red | B, T, S | 20 | 4 | 1 7 | See ¶ (b)(11) | 15 °C. |
Rose | B, T | 20 | 4 | 1 10 | See ¶ (b)(11) | 15 °C. |
Small hop | B, T | 20 | 4 | 1 14 | See ¶ (b)(11) | 15 °C. |
Strawberry | B, T | 20 | 3 | 1 7 | See ¶ (b)(11) | 15 °C. |
Sub | B, T | 20 | 4 | 1 14 | See ¶ (b)(11) | 15 °C. |
White | B, T, S | 20 | 3 | 1 7 | See ¶ (b)(11) | 15 °C. |
Corn: | ||||||
Field | B, T, S, TC | 20-30; 25 | 4 | 7 | ||
Pop | B, T, S, TC | 20-30; 25 | 4 | 7 | ||
Cotton | B, T, S | 20-30; 30 | 4 | 1 12 | Test by alternate method; see ¶ (b)(5). | |
Cowpea | B, T, S | 20-30 | 5 | 1 8 | ||
Crambe | T,B | 20;25 | 4 | 7 | KNO3 | |
Crested dogtail | P | 20-30 | 10 | 21 | Light | Prechill at 5° or 10 °C for 3 days. |
Crotalaria: | ||||||
Lance | B, T, S | 20-30 | 4 | 1 10 | ||
Showy | B, T, S | 20-30 | 4 | 1 10 | ||
Slenderleaf | B, T, S | 20-30 | 4 | 1 10 | ||
Striped | B, T, S | 20-30 | 4 | 1 10 | ||
Sunn | B, T, S | 20-30 | 4 | 1 10 | ||
Crownvetch | B,T,TB,S | 20 | 7 | 1 14 | ||
Dallisgrass | P | 20-35 | 7 | 21 | Light; KNO3 | |
Dichondra | B, T | 20-30 | 7 | 1 28 | ||
Drop seed, sand | P | 5-35; 15-35 | 5 | 14 | Light; KNO3 | Prechill at 5 °C for 4 weeks; see § 201.57a . |
Emmer | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days or predry. | |
Fescue: | ||||||
Chewings | P | 15-25 | 7 | 21 | Light and KNO3 optional | Prechill at 5 or 10 °C for 5 days. |
Hair | P | 10-25 | 10 | 28 | KNO3 | |
Hard | P | 15-25 | 7 | 21 | Light and KNO3 optional | |
Meadow | P | 15-25; 20-30 | 5 | 14 | Light and KNO3 optional | |
Red | P | 15-25 | 7 | 21 | Light and KNO3 optional | |
Sheep | P | 15-25 | 7 | 21 | Light and KNO3 optional | |
Tall | P | 15-25; 20-30 | 5 | 14 | Light and KNO3 optional | Prechill at 5 or 10 °C for 5 days and test for 21 days. |
Flatpea | T | 15-25;20 | 14 | 1 28 | ||
Flax | B, T, S | 20-30 | 3 | 7 | ||
Foxtail, creeping | P | 15-30 | 7 | 21 | Light;KNO3 | |
Foxtail, meadow | P | 20-30 | 7 | 14 | Light | |
Galletagrass | P, B | 20; 25; 20-30 | 4 | 10 | See § 201.57a | |
Grama: | ||||||
Blue | P, TB | 20-30 | 7 | 14 | Light | KNO3; see § 201.57a . |
Side-oats | P | 15-30 | 7 | 14 | Light; KNO3 | See § 201.57a . |
Guar | B, T, S | 30; 20-30 | 5 | 1 14 | ||
Guineagrass | P | 15-35 | 10 | 28 | Light; KNO3 optional | |
Hardinggrass | P | 10-30 | 7 | 28 | Light | KNO3. |
Alternate method | P | 15-25 | 7 | 14 | Light; presoak at 15 °C for 24 hrs | |
Hemp | B, T | 20-30 | 3 | 7 | ||
Indiangrass, yellow | P, TS | 20-30 | 7 | 14 | Light; KNO3 | Prechill at 5 °C for 2 weeks; see § 201.57a . |
Indigo, hairy | B, T | 20-30 | 5 | 1 14 | ||
Japanese lawngrass | P | 35-20 | 10 | 28 | Light; KNO3 | |
Johnsongrass | P | 20-35 | 7 | 35 | Light | KNO3; see § 201.57a . |
Kenaf | T, B | 20-30 | 4 | 1 8 | ||
Kochia, forage | P | 20 | 4 | 14 | See § 201.57a . | |
Kudzu | B, T | 20-30 | 5 | 1 14 | ||
Lentil | B, T | 20 | 5 | 1 10 | ||
Lespedeza: | ||||||
Korean | B, T, S | 20-35 | 5 | 1 14 | ||
Sericea | B, T, S | 20-35 | 7 | 1 21 | ||
Siberian | B, T, S | 20-35 | 7 | 1 21 | ||
Striate | B, T, S | 20-35 | 7 | 1 14 | ||
Lovegrass, sand | P | 20-30 | 5 | 14 | Light; KNO3 | Prechill at 5 or 10 °C for 6 weeks; see § 201.57a . |
Lovegrass, weeping | P | 20-35 | 5 | 14 | Light | KNO3; see § 201.57a . |
Lupine: | ||||||
Blue | B, T, S | 20 | 4 | 1 10 | ||
White | B, T | 20 | 3 | 1 10 | ||
Yellow | B, T | 20 | 7 | 1 10 | ||
Manilagrass | P | 35-20 | 10 | 28 | Light; KNO3 | |
Medic, black | B, T, S | 20 | 4 | 1 7 | See ¶ (b)(11) | |
Milkvetch | B, T | 20 | 6 | 1 14 | ||
Alternate method | B, TB, T | 15-25 | 10 | 1 21 | ||
Millet: | ||||||
Browntop | B, P, T | 20-30; 30 | 4 | 14 | Light and KNO3 optional | Predry at 35 or 40 °C for 7 days and test at 30 °C. |
Alternate method | B, P, T | 5-35 | 4 | 14 | Light; KNO3 | |
Foxtail | B, T | 15-30; 20-30 | 4 | 10 | ||
Japanese | B, T | 20-30 | 4 | 10 | ||
Pearl | B, T | 20-30 | 3 | 7 | ||
Proso | B, T | 20-30 | 3 | 7 | ||
Molassesgrass | P | 20-30 | 7 | 21 | Light | |
Mustard: | ||||||
Black | P | 20-30 | 3 | 7 | Light | KNO3 and prechill at 10 °C for 3 days. |
India | P | 20-30 | 3 | 7 | Light | Prechill at 10 °C for 7 days and test for 5 days; KNO3. |
White | P | 20-30 | 3 | 5 | Light | |
Napiergrass | B, T | 20-30 | 3 | 10 | ||
Needlegrass, green: | ||||||
Method 1 | P | 15-30 | 7 | 14 | H2 SO4,GA3 and thiram; dark; see ¶ (b)(7) | |
Method 2 | P | 15-30 | 7 | 14 | KNO3; dark; see (b)(7) | |
Oat | B, T, S | 20; 15 | 5 | 10 | Prechill at 5 or 10 °C for 5 days and test for 7 days or predry and test for 10 days. | |
Oatgrass, tall | P | 20-30 | 6 | 14 | Light | |
Orchardgrass | P, TS | 15-25 | 7 | 21 | Light; germination more rapid on soil | Prechill at 5 or 10 °C for 7 days. |
Panicgrass, blue | P, TS | 20-30 | 7 | 28 | Light | |
Panicgrass, green | P | 15-35 | 10 | 28 | Light; KNO3 optional | |
Pea, field | B, T, S | 20 | 3 | 18 | ||
Peanut | B, T, S | 20-30; 25 | 5 | 110 | Remove shells | Ethephon or ethylene; see ¶ (a) (10) and (11). |
Radish | B, T | 20 | 4 | 6 | ||
Rape: | ||||||
Annual | B, T | 20-30 | 3 | 7 | ||
Bird | P | 20-30 | 3 | 10 | Light | KNO3. |
Turnip | B, T | 20-30 | 3 | 7 | ||
Winter | B, T | 20-30 | 3 | 7 | ||
Redtop | P, TB | 20-30 | 5 | 10 | Light | KNO3. |
Rescuegrass | P, S | 10-30 | 7 | 28 | Light; see ¶ (b)(8) for alternate method | In soil at 15 °C. |
Rhodesgrass | P | 20-30 | 6 | 14 | Light; KNO3 | |
Rice | T, S | 20-30; 30 | 5 | 14 | See ¶ (b)(9) for alternate method | Presoak; see ¶ (b)(9). |
Ricegrass, Indian | P | 15 | 7 | 42 | Prechill at 5 °C for 4 weeks and test for 21 additional days; see § 201.57a . | |
Alternate method | S | 5-15; 15; 15-25 | 7 | 28 | Dark; prechill in soil at 5 °C for 4 weeks; see § 201.57a . | |
Roughpea | B, T | 20 | 7 | 114 | ||
Rye | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days or predry. | |
Rye, mountain | B, T | 20; 15 | 4 | 7 | See § 201.57a . | |
Ryegrass: | ||||||
Annual | P, TB | 15-25 | 5 | 14 | Light optional; see ¶ (b)(10) for fluorescence test | Light; KNO3; prechill at 5 or 10 °C for 5 days and test at 15-25 °C; if still dormant prechill for 3 days and continue test at 15-25 °C an additional 4 days. |
Intermediate | P, TB | 15-25 | 7 | 14 | Light | KNO3 and prechill at 5 or 10 °C for 5 days and test at 15-25 °C; if still dormant rechill for 3 days and continue test at 15-25 °C an additional 4 days. |
Perennial | P, TB | 15-25 | 5 | 14 | Light optional; see ¶ (b)(10) for fluorescence test | Light; KNO3; prechill at 5 or 10 °C for 5 days and test at 15-25 °C; if still dormant rechill for 3 days and continue test at 15-25 °C an additional 4 days. |
Wimmera | P, TB | 15-25; 20-30 | 5 | 14 | Light optional | Light; KNO3; prechill at 5 or 10 °C for 5 days and test at 15-25 °C; if still dormant rechill for 3 days and continue test at 15-25 °C an additional 4 days. |
Safflower | P, B, T, S | 15; 20 | 4 | 14 | Light at 15 °C | |
Sagewort, Louisiana | P | 15-25 | 7 | 14 | Light | |
Sainfoin | B, T | 20-30 | 4 | 1 14 | ||
Saltbush, fourwing | B | 20 | 5 | 14 | See ¶ (b)(13) | Prechill at 5 °C for 7 days. |
Alternate method | B | 15 | 21 | |||
Sesame | B, T, TB | 20-30 | 3 | 6 | ||
Sesbania | B, T | 20-30 | 5 | 1 7 | ||
Smilo | P | 20-30 | 7 | 42 | Light | Prechill at 5 °C for 2 weeks; see § 201.57a . |
Sorghum | B, T, S | 20-30 | 4 | 10 | Prechill grain vars. at 5° or 10 °C for 5 days; test sweet vars. at 30-45 °C, maintaining 45 °C for 2-4 hours per day. | |
Sorghum almum | T, S | 20-35; 15-35 | 5 | 21 | Prechill at 5 °C for 5 days; on the 10th day of test, clip or pierce the distal end of ungerminated seeds. | |
Sorghum-sudangrass | B, T, S | 20-30; 25 | 4 | 10 | Prechill at 5 or 10 °C for 5 days. | |
Sorgrass2 | B, T, S | 15-35; 20-35 | 5 | 21 | Prechill at 5 or 10 °C for 7 days. | |
Sourclover | B, T | 20 | 3 | 1 14 | See ¶ (b)(11) | |
Soybean | B, T, S, TC | 20-30; 25 | 5 | 1 8 | ||
Spelt | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days, or predry. | |
Sudangrass | B, T, S | 20-30; 15-30 | 4 | 10 | Prechill at 10 °C for 5 days. | |
Sunflower | T,B | 20 | 4 | 7 | ||
Sweetclover: | ||||||
White | B, T, S | 20 | 4 | 1 7 | See ¶ (b)(11) | |
Yellow | B, T, S | 20 | 4 | 1 7 | See ¶ (b)(11) | |
Sweet vernalgrass | P | 20-30 | 6 | 14 | Light | |
Sweetvetch, northern | B, TB, T | 15-25; 20 | 14 | 1 28 | ||
Switchgrass | P, TS | 15-30 | 7 | 14 | Light; KNO3 | Prechill at 5 °C for 2 weeks; see § 201.57a . |
Teff | TB | 20-30 | 4 | 7 | KNO3 | |
Timothy | P, TB | 15-25; 20-30 | 5 | 10 | Light; see ¶ (a)(9) | KNO3 and prechill at 5 or 10 °C for 5 days. |
Timothy, turf | P, TB | 15-25; 20-30 | 5 | 10 | Light | KNO3 and prechill at 5 or 10 °C for 5 days. |
Tobacco | P, TB | 20-30 | 7 | 14 | Light | |
Trefoil: | ||||||
Big | B, T | 20 | 5 | 1 12 | ||
Birdsfoot | B, P, T | 20 | 5 | 1 12 | ||
Triticale | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days, or predry. | |
Vaseygrass | P | 20-35 | 7 | 21 | Light | KNO3. |
Veldtgrass | P | 10-30 | 7 | 28 | Light | See § 201.57a . |
Velvetbean | B, T, S, C | 20-30 | 3 | 1 14 | ||
Velvetgrass | P | 20-30 | 6 | 14 | Light | |
Vetch: | ||||||
Common | B, T | 20 | 5 | 1 10 | ||
Hairy | B, T | 20 | 5 | 1 14 | ||
Hungarian | B, T | 20 | 5 | 1 10 | ||
Monantha | B, T | 20 | 5 | 1 10 | ||
Narrowleaf | B, T | 20 | 5 | 1 14 | ||
Purple | B, T | 20 | 5 | 1 10 | ||
Woollypod | B, T | 20 | 5 | 1 14 | Prechill at 10 °C for 5 days, test at 15 °C. | |
Wheat: | ||||||
Common | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days, or predry. | |
Club | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days, or predry. | |
Durum | B, T, S | 20; 15 | 4 | 10 | Prechill at 5 or 10 °C for 5 days, or predry. | |
Polish | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days, or predry. | |
Poulard | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days, or predry. | |
Wheat Agrotricum | B, T, S | 20; 15 | 4 | 7 | Prechill at 5 or 10 °C for 5 days, or predry. | |
Wheatgrass: | ||||||
Beardless | P, TB | 15-25 | 7 | 14 | Light and KNO3 optional | KNO3 and prechill at 5 or 10 °C for 7 days. |
Fairway crested | P, TB | 15-25; 20-30 | 5 | 14 | Light and KNO3 optional | KNO3 and prechill at 5 or 10 °C for 7 days. |
Standard crested | P, TB | 15-25; 20-30 | 5 | 14 | Light and KNO3 optional | KNO3 and prechill at 5 or 10 °C for 7 days. |
Intermediate | P | 15-25 | 5 | 28 | Light and KNO3 optional | KNO3 and prechill at 5 or 10 °C for 7 days. |
Alternate method | P | 20-30 | 5 | 28 | Light | |
Pubescent | P | 15-25 | 5 | 28 | Light and KNO3 optional | KNO3 and prechill at 5 or 10 °C for 7 days. |
Alternate method | P | 20-30 | 5 | 28 | Light | |
Siberian | P, TB | 15-25 | 7 | 14 | Light and KNO3 optional | KNO3 and prechill at 5 or 10 °C for 7 days. |
Slender | P, TB | 15-25; 10-30 | 5 | 14 | Light and KNO3 optional | Prechill at 5 or 10 °C for 5 days; if still dormant on the 10th day, rechill 2 days, then place at 20-30 °C for 4 days. |
Streambank | P, TB | 15-25 | 5 | 14 | Light and KNO3 optional | Prechill at 5 or 10 °C for 5 days. |
Tall | P | 15-25 | 5 | 21 | Light and KNO3 optional | Prechill at 5 or 10 °C for 5 days. |
Alternate method | P | 20-30 | 5 | 21 | Light | Prechill at 5 or 10 °C for 5 days. |
Western | B, P, T | 15-30 | 7 | 28 | Dark | KNO3 or soil; see § 201.57a . |
Wildrye: | ||||||
Basin | P | 15-25 | 10 | 21 | See § 201.57a . | |
Canada | P | 15-30 | 7 | 21 | Light | Prechill at 5 °C for 2 weeks. |
Russian | P | 20-30 | 5 | 14 | Light | Prechill at 5 or 10 °C for 5 days. |
VEGETABLE SEED | ||||||
Artichoke | B, T | 20-30 | 7 | 21 | ||
Asparagus | B, T, S | 20-30 | 7 | 21 | ||
Asparagusbean | B, T, S | 20-30 | 5 | 1 8 | ||
Bean: | ||||||
Garden | B, T, S, TC | 20-30; 25 | None | 1 8 | See ¶ (b)(12). | |
Lima | B, T, C, S | 20-30 | 5 | 1 9 | ||
Runner | B, T, S | 20-30 | 5 | 1 9 | ||
Beet | B, T, S | 20-30 | 3 | 14 | See ¶ (b)(3) | |
Broadbean | S, C | 20 | 4 | 1 14 | See ¶ (b)(11) | Prechill at 10 °C for 3 days. |
Broccoli | B, P, T | 20-30 | 3 | 10 | Prechill at 5 or 10 °C for 3 days; KNO3 and light. | |
Brussels Sprouts | B, P, T | 20-30 | 3 | 10 | Prechill 5 days at 5 or 10 °C for 3 days; KNO3 and Light. | |
Burdock, great | B, T | 20-30 | 7 | 14 | ||
Cabbage | B, P, T | 20-30 | 3 | 10 | Prechill at 5 or 10 °C for 3 days; KNO3 and light. | |
Cabbage, Chinese | B, T | 20-30 | 3 | 7 | ||
Cabbage, tronchuda | B, P | 20-30 | 3 | 10 | Prechill at 5 or 10 °C for 3 days; KNO3 and light. | |
Cardoon | B, T | 20-30 | 7 | 21 | ||
Carrot | B, T | 20-30 | 6 | 14 | ||
Cauliflower | B, P, T | 20-30 | 3 | 10 | Prechill at 5 or 10 °C for 3 days; KNO3 and light | |
Celeriac | P | 5-25; 20 | 10 | 21 | Light; see ¶ (a)(9) | |
Celery | P | 15-25; 20 | 10 | 21 | Light; see ¶ (a)(9) | |
Chard, Swiss | B, T, S | 20-30 | 3 | 14 | See ¶ (b)(3) | |
Chicory | P, TS | 20-30 | 5 | 14 | Light; KNO3 or soil; see ¶ (a)(9) | |
Chives | B, T | 20 | 6 | 14 | ||
Citron | B, T | 20-30 | 7 | 14 | Soak seeds 6 hrs | Test at 30 °C. |
Collards | B, P, T | 20-30 | 3 | 10 | Prechill at 5 or 10 °C for 3 days; KNO3 and light . | |
Corn, sweet | B, T, S, TC | 20-30; 25 | 4 | 7 | ||
Cornsalad | B, T | 15 | 7 | 28 | Test at 10 °C. | |
Cowpea | B, T, S | 20-30 | 5 | 1 8 | ||
Cress: | ||||||
Garden | B, P, T | 15 | 4 | 10 | Light. | |
Upland | P, TB | 20-35 | 4 | 7 | Light; KNO3 | |
Water | P | 20-30 | 4 | 14 | Light | |
Cucumber | B, T, S | 20-30 | 3 | 7 | Keep substratum on dry side; see ¶ (a)(3) | |
Dandelion | P, TB | 20-30 | 7 | 21 | Light; see ¶ (a)(9) | |
Dill | B, T | 20-30 | 7 | 21 | ||
Eggplant | P, TB, RB, T | 20-30 | 7 | 14 | Light; KNO3. | |
Endive | P, TS | 20-30 | 5 | 14 | Light; KNO3 or soil | See ¶ (b)(6). |
Gherkin, West India | B, T, S | 20-30 | 3 | 7 | Test at 30 °C. | |
Kale | B, P, T | 20-30 | 3 | 10 | Prechill at 5° or 10 °C for 3 days; KNO3 and light. | |
Kale, Chinese | B, P, T | 20-30 | 3 | 10 | Prechill at 5 or 10 °C for 3 days; KNO3 and light. | |
Kale, Siberian | B, P, T | 20-30; 20 | 3 | 7 | ||
Kohlrabi | B, P, T | 20-30 | 3 | 10 | Prechill at 5 or 10 °C for 3 days; KNO3 and light. | |
Leek | B, T | 20 | 6 | 14 | ||
Lettuce | P | 20 | None | 7 | Light | Prechill at 10 °C for 3 days or test at 15 °C. |
Melon | B, T, S | 20-30 | 4 | 10 | Keep substratum on dry side; see ¶ (a)(3) | |
Mustard, India | P | 20-30 | 3 | 7 | Light | Prechill at 10 °C for 7 days and test for 5 additional days; KNO3. |
Mustard, spinach | B, T | 20-30 | 3 | 7 | ||
Okra | B, T | 20-30 | 4 | 1 14 | ||
Onion | B, T | 20 | 6 | 10 | ||
Alternate method | S | 20 | 6 | 12 | ||
Onion, Welsh | B, T | 20 | 6 | 10 | ||
Pak-choi | B, T | 20-30 | 3 | 7 | ||
Parsley | B, T, TS | 20-30 | 11 | 28 | ||
Parsnip | B, T, TS | 20-30 | 6 | 28 | ||
Pea | B, T,S | 20 | 5 | 1 8 | ||
Pepper | TB, RB, T | 20-30 | 6 | 14 | Light and KNO3. | |
Pumpkin | B, T, S | 20-30 | 4 | 7 | Keep substratum on dry side; see ¶ (a)(3) | |
Radish | B, T | 20 | 4 | 6 | ||
Rhubarb | TB, TS | 20-30 | 7 | 21 | Light | |
Rutabaga | B, T | 20-30 | 3 | 14 | ||
Sage | B, T, S | 20-30 | 5 | 14 | ||
Salsify | B, T | 15 | 5 | 10 | Prechill at 10 °C for 3 days. | |
Savory, summer | B, T | 20-30 | 5 | 21 | ||
Sorrel | P, TB, TS | 20-30 | 3 | 14 | Light | Test at 15 °C. |
Soybean | B, T, S, TC | 20-30; 25 | 5 | 1 8 | ||
Spinach | TB, T | 15;10 | 7 | 21 | Keep substratum on dry side; see ¶ (a)(3) | |
Spinach, New Zealand | T | 15; 20 | 5 | 21 | Soak fruits overnight (16 hrs), air dry 7 hrs; plant in very wet towels; do not rewater unless later counts exhibit drying out | On 21st day scrape fruits and test for 7 additional days. |
Alternate method | B, T | 15 | 5 | 21 | Remove pulp from basal end of fruit | |
Squash | B, T, S | 20-30 | 4 | 7 | Keep substratum on dry side; see ¶ (a)(3) | |
Tomato | B, P, RB, T | 20-30 | 5 | 14 | Light; KNO3. | |
Tomato, husk | P, TB | 20-30 | 7 | 28 | Light; KNO3 | |
Turnip | B, T | 20-30 | 3 | 7 | ||
Watermelon | B, T, S | 20-30; 25 | 4 | 14 | Keep substratum on dry side; see ¶ (a)(3) | Test at 30 °C. |
1 Hard seeds may be present. (See § 201.57 )
2 Rhizomatous derivatives of a johnsongrass sorghum cross or a johnsongrass sudangrass cross.
7 C.F.R. §201.58
For FEDERAL REGISTER citations affecting § 201.58 , see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.