What is the definition of a biennial plant?

A biennial plant is defined as one that completes its life cycle over a two-year period. In the first year, a biennial typically focuses on vegetative growth, developing leaves, stems, and a root system, but it does not produce flowers or seeds. The following year, the plant undergoes reproductive growth, flowering and setting seeds before it dies. This growth cycle is distinct from annuals, which complete their life cycle in one year, and perennials, which live for multiple years and can flower repeatedly. Understanding this definition is crucial in weed management, as recognizing whether a plant is biennial can inform appropriate control strategies and timing for intervention.