Late Flowering Seed Viability Question

From The marijuana bible, "The cask, or outer protective shell, on some seeds never properly seals, which allows moisture and air to penetrate. It also causes hormone concentrations to dissipate and make seeds less viable." Is there a hormone that can be added to the plant for the viability of seeds?

sounds like an endogenous hormone is being described here. Seeds take a week or 2 to mature on the plant.

dbo24242 said:

sounds like an endogenous hormone is being described here. Seeds take a week or 2 to mature on the plant.

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See, I'm looking to breed seeds for stock in later strains. That's the main reason to keep the viability high. It losing the hormone, i'm sure this question has been asked at least once before.