There's been some discussion in a Flickr forum about our upcoming "ditsy print" contest theme and what exactly ditsy means, so I'm going to attempt to clarify what we had in mind. A ditsy print is quite small in scale, and the design motifs are usually scattered or random rather than being ordered in a definable pattern like rows or stripes. At a distance, a ditsy print looks almost like a solid color, the scale is so small. (I read that definition online somewhere awhile back but unfortunately can't find the source now.) Florals seem to be the most common element in vintage ditsy prints, but we're not necessarily looking for florals and haven't specified that for this contest.
The "Daisy ditsy mini" design by Spoonflower design group Frumafar is, I think, a good example of a floral ditsy print. It's shown above on an 8-inch swatch so you can see how small the flowers are. I hope this is useful to you all, but please feel free to ask any further clarifying questions in the comments. Good luck and happy designing!