Which of the following is NOT a characteristic of summer annual plants?

Summer annual plants are recognized for their distinct lifecycle that allows them to complete their growth from seed to maturity in a single year. This characteristic enables them to germinate, grow, flower, and produce seeds within the warm months, taking full advantage of the seasonal conditions. They emerge from seeds, which is a fundamental part of their reproductive strategy. Additionally, these plants are typically adapted to warm climates, thriving in the conditions that summer provides.

The characteristic of requiring multiple seasons is not applicable to summer annuals, as they do not need more than one growing season to complete their lifecycle. Instead, they have evolved to be efficient in using the warm temperatures and extended daylight of summer to achieve their growth and reproduction in a single cycle, making the correct answer clear.