In brief
For salad, choose healthy, well-colored tomatoes. Plan their use according to maturity, instead of treating each purchase equally.
Useful to know
The University of Iowa recommends firm, well-colored tomatoes with no brown or wrinkled areas. For best taste, it describes storage at room temperature outside of direct sun and cooling if not used before spoilage. [1]
It's an indication of whole tomatoes. Do not automatically carry it over an already sliced tomato or ready-made salad. The type of product and the preparation done change the storage task.
Before slicing, rinse under running water and dry. For a sandwich, choose slices that can be arranged stably; for a salad - pieces comfortable for the rest of the ingredients. Both ways are present as culinary applications in the guide. [1]
A practical approach when picking up the purchase is to separate the tomatoes for the closest meal from those for later. Thus, maturity is involved in the meal plan, instead of all the fruits being used in random order.
Sources
For further detail and to check the information: