We just recently added Potato Onion sets to our current perennial offerings.  
19.89 for 20 Sets + free shipping
https://www.interwovenpermaculture.com/store/p22/potato_onion


Our complete list of nursery stock that is available for immediate shipment
-Egyptian Walking Onion Top Sets
-Potato Onion Sets
-Chinese Wild Yam 'Air Tubers"

They can all be requested to be shipped in fall or spring at checkout, along with the rest of our seasonally available stock such as trees and tubers.

-Jerusalem Artichokes
-Ground Nuts
-Chinese Artichokes
-Comfrey Bocking #4
-Chestnut Trees
-black locust Trees
-Thornless Honey Locust Trees

Consider checking out all of our permaculture nursery stock at... https://www.interwovenpermaculture.com/store/c1/Featured_Products.html