True or False: A grower can extend the growing season by starting frost-sensitive plants in the greenhouse.

Starting frost-sensitive plants in a greenhouse allows growers to extend the growing season effectively. This is because greenhouses create a controlled environment that can protect plants from cold temperatures and frost. By beginning the growth process in a greenhouse, plants can be started earlier in the year, taking advantage of warmer conditions that would not be available outdoors.

In the greenhouse, growers can manage temperature, humidity, and light levels, which leads to healthier plant development and allows for earlier harvests. This practice is particularly beneficial for gardeners in regions with short growing seasons or late frosts, as it permits them to cultivate crops that wouldn’t otherwise survive in their climate if seeded directly into the ground.

Considering other options, relying solely on heating mats is not necessary to extend the growing season, as the greenhouse itself provides adequate warmth. Furthermore, stating that it's not feasible undermines the benefits of greenhouse cultivation, which is widely recognized as an effective horticultural practice.