If seeds are in hermetically sealed containers, what is the retest period for resale?

The correct answer reflects the standard practice regarding the retest period for seeds contained in hermetically sealed containers. Hermetically sealed containers are designed to prevent the ingress of air and moisture, which significantly enhances the longevity and viability of the seeds stored within them. Given this controlled environment, seeds can maintain their quality for an extended period without the same risk of deterioration that non-sealed packaging might face.

Consequently, a retest period of 18 months for seeds in such sealed conditions is appropriate, as it allows for sufficient time to ensure that the seeds remain viable and effectively viable for germination before they are sold. This practice aligns with industry standards to ensure that consumers receive seeds that meet quality expectations and support successful planting outcomes.