The one-pound line
Updated
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Under a pound, at or above standard
Vegetable seed in containers of one pound or less whose germination equals or betters the standard in 7 CFR 201.31 need not be labeled to show the percentage of germination and date of test. That is the common garden seed packet, and it is why most of them do not show a percentage.
Under a pound, below standard
The words "Below Standard" clearly shown in a conspicuous place on the label or on the face of the container, in type no smaller than 8 points, plus the percentage of germination and the percentage of hard seed if any. A different label entirely.
Over a pound, always
Each variety of vegetable seed in containers of more than one pound is labeled to show the percentage of germination and the percentage of hard seed if any, with no standard-dependent exception, plus a lot number.
So the same seed gets two or three labels
A packet, a half-pound pouch and a five-pound bag of one variety are three different printing jobs under this rule. Deciding the range up front means designing one template with a known set of variants.
The line is weight, not volume
Which matters because the catalog measures containers in milliliters. Seed density varies enormously between a lettuce and a bean, so the same jar is under the line for one crop and over it for another.
Which means weighing, not estimating
Fill the jar the way production will fill it and weigh the seed. That is the only way to know which side of the line a given container and crop combination falls on, and the answer changes the label.
And it is the federal line
State seed laws run alongside the Federal Seed Act, which reaches interstate commerce. A sale within one state can answer to different requirements, so the one-pound reading here is the federal one.