For creating your Food forests good quality seeds and saplings should be choosen.
Few suggestions on choosing Fruit tree seeds and saplings for food forest:
* Find Local fruit trees near by to your locality. You can save the seeds from fruits. (I saved seeds of sapota from nearby farm)
* If you go for online store, it is recommended to buy seeds and not saplings. As saplings may be damaged on delivery. ( I received few good saplings as well as damaged one)
* Analyse where most of the birds have nests in your locality. Nearby the trees you can find few fruit tree saplings. ( I found few gauva saplings nearby the banyan tree, where most of the birds built their nests in the banyan tree)
* Air layering, a method to grow roots on any tree branch. After growing the roots you can cut them and transplant in your field. ( I successfully did air layering for henna plant. Failed in first attempt and succeeded in next attempt).
* Choose ripen fruits to save fruit tree seeds.
Vegetable seeds
There are few organisations where you can buy open pollinated seeds.
There are so many exotic variety vegetable seeds they have. The one I like most from them is black carrots, where those carrots are used to make soup to boost up immunity.
They have many varieties of vegetables seeds. While seeing their Facebook page it tempts me to buy all the seeds. The one of the most I like is sankarametta tomato where one tomato weighs 250 grams.
They to have some exotic vegetable seeds. One of the most I found interesting was the variety of okra which grows more than 6 feet in height.
There are some other seed saving organisations around us. We will update soon.
Edited : for fruit tree seeds online you can purchase from Nurserylive website.