I've shopped through Raintree's catalog over the years. They carry unusual plants, food plants that
permie type people tend to want,as well as the apples plums peaches pears nectarines...
When I am looking through their offerings, I have to pay special attention to frost hardiness, since I live where it gets MUCH colder and is
dryer, also warmer in the summer.
Not everything I bought from them survived,but I attributed it to the conditionsat my place at the time I planted. Their shipping and packaging was adequate to the plants survival in transit, but I did not have "soil" at the time, just fine sand with a bit of clay. The organic component was less than 1 %
carbon, both the organic and inorganic carbon, and it occupied a layer less than 1/8 inch thick at the surface. I was delighted that as many plants survived as did.
but it is important to know what you are looking for in a plant, and what the plant is going to need for growing conditions.