I have a crude understanding that planted seeds should be non-hybrid non-gmo open-pollinated in order for their offspring to be as good as the parents.
If I try to use organic produce from the grocery store to start different varieties of plants which of them would create quality offspring?
Any root vegetables like potatoes, garlic, onions, carrots, beets?
Any vegetables that still have their roots intact like scallions or watercress?
Also what different seeds would work? Chia seeds? Flax seeds? Wheatgrass seeds? Other seeds?
For fruit, I assume that many fruits have sproutable seeds, but that few if any would grow a new generation as good as the parent? Is this correct?
Also my local market has tomatoes labels as "heirloom tomatoes". Are the seeds in these really "heirloom" and replantable or is this just a marketing gimmick?
By the way, I am not asking if it is a good idea. I am not planning on starting a garden this way, I am more interested from an educational perspective.