I will be using these for my Future War Commander games as well as my 15mm games.
I picked up some carpet at Menard's as the base of the field. It has ridges that I thought look close to plowed fields. Then I went to Hobby Lobby and bought some floral stems with lots of small blooms. I got red, green, blue, and yellow blooms. These will give me a nice variety when I get them all done.
I pulled off all the blooms and used wood glue to glue them to the carpet. I glued the blooms in the low parts of the rows. I just put a drop of glue down and stuck the bloom on. Let the glue dry completely before moving these around.
You can cut different sizes of depending on what you want. I have finished 3 pieces and half of a 4th. Two are 8" x 5" and two are 5" x 5".
Do you have fields in your games? What do you use?