I'm wondering how the picture are chosen when a blog is displayed on a "tag" or "topics" page. Specifically, my most recent post is currently on page four of "gardening" (http://en.wordpress.com/tag/gardening/4/), but the image is not the most interesting, and I'd imagine that's a part of why it hasn't gotten many clicks. Is there a way for me to change the picture, or choose, before publishing, what image is used? My theme is Twenty Eleven.
Thanks for helping!
The blog I need help with is spokesandpetals.wordpress.com.