A label in a flat of seeds should include the:

The correct answer emphasizes the essential information required for proper identification and management of a flat of seeds. Including the name or type of plant, the specific variety, and the date seeded ensures that anyone handling the seeds can accurately recognize what they are working with, understand the expected growth timeline, and track the development of the plants over time.

Identifying the plant and variety is crucial for various reasons, such as ensuring compatibility with the growing environment, understanding care requirements, and aiding in future planning. The date seeded is important for managing the growth cycle, allowing for proper planning regarding watering, fertilization, and when to expect germination.

While the other options mention useful information, they do not encompass the fundamental aspects necessary for effective seed management. For instance, the date seeded and the selling date do not provide sufficient details about what is being planted, and while the percent of germination is valuable, it is not as critical as the basic identifiers and timeline for planting. Hence, the most informative label will include the name or type of plant, variety, and date seeded.