Facebook: https://www.facebook.com/openfarmdays
Landing Page: http://www.albertafarmdays.com/
Placement: Desktop newsfeed
Critique: The image shows people participating in an actual open day. It is relevant to what viewers want to know about the service you are providing. Value proposition: learn where your fresh food comes from in your area. A clear call-to-action is also present. Additional text below the image might engage the reader more. Something like weekend deals or promotions for groups would be helpful.
The landing page details upcoming open farm days along with links for which farms can be visited and regional guides. You can print them and plan your visits accordingly.