There is no place where you can buy unlimited walnuts. You can find walnuts near walnut trees in the jungle or outside Tropicton!
There is an unlimited supply of both Fancy and Glorious tack in Shellton, on Turtle Isle.
There is an unlimited supply of them in the Treeton flower shop. Hope I helped! ~ROAN~
There is unlimited draft tack in Wington, Bird Isle.
Jungle Isle Foal Adoption Center carries and unlimited supply of cremello foals
It is in the middle of jungle isle.Ask someone in global.
Wington food store =)
There are no cities that hold an unlimited amount of carrots. You can, however, get them by completing carrot runs. You can also get carrots by weeding the vegetable gardens in both Wington and Carrotton.
Wington Tack Shop
Treeton Pet Store for $3,000.
You can buy tham at Earton General Store :)
You either have to grow it on your ranch or buy it.
Given the fact that all walnuts come from walnut trees, I'd say the answer is pretty obvious.