What is a typical lifespan of a biennial weed's life cycle?

A biennial weed typically completes its life cycle over two growing seasons. During the first season, these plants generally focus on vegetative growth, developing roots, stems, and leaves. They usually do not produce flowers or seeds during this phase. However, in the second growing season, biennial weeds will flower, produce seeds, and then die, thus completing their life cycle. This two-year process distinguishes biennial weeds from annuals, which grow, flower, and die within a single growing season, and perennials, which can live for more than two years and may go through multiple cycles of growth and reproduction.

The lifespan of a biennial weed's life cycle is specifically characterized by this two-year pattern of growth and reproduction, making the choice of two growing seasons the most accurate description.