Tennessee Category 3 Pesticide Certification Practice Test & Study Guide

Higher temperatures in spring can significantly accelerate the flowering process of winter annual weeds. Winter annuals typically germinate in the fall, survive the winter, and then resume growth in early spring. As temperatures rise, these plants become more active metabolically, leading to increased growth rates and the development of flowers. Warmer temperatures provide the energy needed for these plants to transition from vegetative growth to reproductive stages more rapidly.

In contrast, increased soil moisture generally supports growth but does not specifically trigger flowering. Decreased light exposure can inhibit growth and flowering as plants require adequate light for photosynthesis and flowering processes. Soil compaction can hinder root growth and nutrient uptake, negatively impacting the overall health and flowering of the plants. Therefore, higher temperatures in spring directly contribute to the timing and speed of flowering for winter annual weeds.