I've been digging out some plants in my garden, and have quite a few comfrey roots and crowns as well as sunchoke(aka jerusalem artichoke) tubers to share or trade. Both are perennials known for their tenacity- plant them where you want them to stay for a looong time, because it's hard to get rid of them once they are established. My comfrey seems self-sterile, doesn't produce seed and spread that way, but if the roots are disturbed or severed each one will send up shoots and become it's own plant- pity the fool who tries to rototill in a comfrey patch! But very useful to have alongside the garden, next to compost pile- great for a groundcover in the orchard, chop-n-drop mulch, awesome compost tea ingredient, bees, worms, chickens, rabbits, pigs love the stuff! I add chopped leaves to planting holes for most all my veggie transplants, potatoes- they thrive on the mineral richness of the material as it quickly breaks down. Also medicinal, quickens cell division for healing purposes(also known as 'knitbone').
Sunchokes are a bit more 'spready' as they send their tubers out on rhizomes 3-6' from where they were planted every year, they make nice flowers in the late summer. Decent edible in late fall, or early spring- good for diabetics because on inulin content-no sugar. Good for a quick hedge, they grow to 6-9' tall, naturalized wildflower beds. Goldfinches will thank you for the seeds, and they produce lots of biomass for the compost pile with their pithy stalks.
I'm looking for cold-hardy, shorter season varieties fig cuttings or starts as trade, or S/H expenses. Pm me if interested.