Many annual flowers grown in Louisiana, like begonia and periwinkles, are actually what type of plants?

The correct classification for many annual flowers grown in Louisiana, such as begonia and periwinkles, is tender perennials. These plants are often treated as annuals in regions with cold winters, like much of Louisiana, because they cannot survive freezing temperatures. However, in warmer climates or with the right care, they can live for multiple years, flowering throughout their growing season.

Tender perennials are characterized by their ability to regrow from their root systems when the right conditions are present, typically in milder climates. This allows them to provide extended periods of blooming unlike true hardy annuals, which complete their life cycle in one growing season, or tender annuals, which are generally treated as annuals due to their sensitivity to cold. While succulents are another category of plants known for their water-storing capabilities, they don't align with the characteristics of the flowers mentioned. Therefore, tender perennials fits the plants' classification and growing behavior more accurately.