This is their first year, so I may not be able to cut any spears off. These are an improved variety. They claim 2 weeks worth off cutting this year and 4 next year. We'll see. In general, once the plants are established, the spears may be harvested from their first appearance in the spring through May or June (as long as 8 to 10 weeks) and then you get to wait until next year which should be an even larger crop.
Charles- Wisconsin, Zone "4b"