When you drive on Tianmushan Road to the downtown and open your car window, white catkins fly into your car every now and then. In the West Lake scenic zone, you will see more flying catkins.

    Now the season of flying willow catkins comes again.

    From the beginning of April, willow catkins begin to fly. As the weather gets warmer and warmer, there will be more and more catkins in the air. In the middle of May, poplar catkins that assemble the willow catkins very much will also been seen in the air. In the catkin season when catkins are all blown into the air, you’d better wear some protection veil if you are allergic to them。