(AREA) -- Heavy rainstorms this spring have forced Michigan sugar beet growers to postpone planting. Michigan State University Extension educator and sugar beet expert Steven Poindexter says it's not time to panic despite the delay. He say that although earlier planting of sugar beets means more growing time and usually larger beets, farmers have planted them as late as June some years and still had a successful harvest. Dave Zwerk of Tuscola County-based Zwerk and Sons Farms says he's hoping his 1,200 sugar beet acres will be ready for planting in the coming weeks. Zwerk says if he "can get in there in the next week or so," he "might not lose a lot of yield."