Mixed cherry plum tomatoes come in a variety of sizes and colors, mainly yellow, red, and dark red/brown. Cherry plums tomatoes should be almost firm, thin, and smooth-skinned. The flavor will be a balance of sweet and tart. Like all tomatoes, cherry plum tomatoes can be classified based on how they grow, as their plants produce in two different forms: determinate or indeterminate. Determinate varieties grow on bush-like plants with short vines and bear just one crop per season, while indeterminate varieties are long, sprawling vine plants that bear fruit continuously throughout the season.