Growing cranberries is a lot harder than you might think. There are steps for every season.
Nothing much happens, but everything is flooded and frozen, which protects the vines.
Everything melts, and the water is drained out so the flowers grow.
from Bernd Haynold (BerndH) on commons.wikimedia.org - CC BY 2.5
The petals fall off the flowers and the cranberries start to grow.
The fields are flooded and machines loosen the berries so they float to the surface.
from Keith Weller, USDA-ARS on commons.wikimedia.org - Public Domain