A biennial weed requires two growing seasons to complete its life cycle.

• A. True
• B. False
• C. Not always
• D. Depends on environment

Answer: (A)

Biennial weeds have life cycles that span two growing seasons. In the first season they grow vegetatively, often forming a rosette and storing energy. In the second season they produce flowering stems, set seeds, and then die. That two-season pattern is why the statement is correct. This distinguishes them from annuals, which complete their life cycle in one growing season, and from perennials, which live for more than two years and can flower multiple times. For management, targeting these plants in the first year helps prevent flowering and seed production in the second year. While some plants can act differently under unusual conditions, the standard classification used here is two growing seasons.