What does the germination percentage on the seed bag tag mean for me?

The germination percentage on the tag is the share of seeds, out of 100, that sprouted in a laboratory test for that lot. A higher number means more seeds will come up in your field, though field germination is usually a bit lower than the lab figure because of soil, moisture and pests. Most certified seed must meet a minimum germination standard for that crop (often around 80 to 85 percent or higher depending on the crop). If the printed germination is on the lower side, or the validity (test) date is old, you should raise your seed rate slightly so you still get the plant population you want. Also check the validity date, because germination drops as seed ages past it. The safest habit is a quick home germination test just before sowing, especially for older or saved seed. Confirm the minimum germination standard for your crop with your KVK if you are unsure whether a lot is acceptable.