You won't necessarily get what you think you are getting. A lot of foods are first generation, unstable, hybrids. They'll have a tendency to revert back to one of the parent varieties that were crossbred to produce the seeds that grew the food you purchased. You might also get first generation crosses from stable varieties that were planted in pollinator distance of another variety.
It's also not uncommon for produce to have been picked before the seeds have fully matured. You might get little or no germination if you try to grow those seeds.
