Our friend Zach Elfers has been working for years on this diverse population of what he likes to call "sunroots" (more commonly known as sunchokes or Jerusalem artichokes). Native to North America, this plant is a perennial sunflower with edible tubers. It's usually propagated clonally by tuber (which is the only way to grow named cultivars, since the seeds won't grow true to type, and indeed require cross pollination from another variety to even set seed). We're offering Zach's true seed, which will yield a diversity of forms. He collected as many cultivars and wild tubers as he could find, some one or two dozen varieties, and grew them together in a hybrid swarm. Every year his patch produces loads of seeds, which are highly desirable to songbirds so they must be attended to daily or bagged for collection purposes. Experiments in growing out this seed have yielded interesting and good results. Great for breeders.
GROWING TIPS FROM ELFERS: They don't need stratification. Plant them 1/4-1/2 inch deep. When they receive enough warmth and moisture they should begin to sprout. Seedlings can also transplant out well with care. If the growing season is long enough and conditions are good, sunroots will flower within the first year. Tubers form in the fall and are harvestable after the first season of growth.