Jersey Supreme Asparagus. Bundle of 10 Two year old crowns. Male asparagus produce very little to no seed so they are able to produce larger and more tasty spears. Plant in full sun to part sun with the roots down in a trench cover the crown (the part where the roots are connected) 2" below the surface. This is a perennial vegetable that can produce for twenty years or more so allow them a permanent spot in your garden. Allow to grow the first year and you can begin harvesting the next year.