I was out of town for the past week and was happy to see that my 2nd year chinook plant sprouted while I was gone. It has 1 very large bine and 4 smaller bines growing. Because I was gone, I don't know which was the first to sprout. I'm assuming the biggest was first, so I'm inclined to prune that one off, but I'm also hesitant to cut the strongest bine off. Any idea which bines i should prune?