The vigor test developed by the Ransom Seed Laboratory combines several tests to identify and evaluate those properties which determine the potential for rapid, uniform emergence and development of normal plants under variable climatic conditions.

When submitting samples for a vigor test, please send at least 1500 – 2000 seeds as the vigor evaluation involves several tests.

Vigor Data Include:

  • Seeds per pound

  • Average seed weight and/or average sprout length

  • % Normal germination under optimum temperature

  • Uniformity of sprout length at an early stage of development

  • Emergence pattern imagery

  • % Normal germination at a stress temperature (hot or cold)

On request, other custom tests related to vigor assessment include:

  • Radicle emergence

  • Preliminary germination counts

Lettuce Vigor

Lettuce Vigor