Fruits and vegetables sounds like a great opportunity for a photo contest or caption our photo. Here are a couple of sites to give you ideas, and more importantly to plan.
http://www.spiderworking.com/blog/2014/12/12/20-facebook-competition-ideas/
http://blog.wishpond.com/post/55008555655/5-sure-fire-facebook-contest-ideas
There are lots of other advice pages too! Good luck!
