Living things respond to their environment. Response to stimuli is an important characteristic of life. Anything that causes a living organism to react is called a stimulus (plural is stimuli) Stimuli can be external or internal. For instance, if you feel like going to the bathroom, it is an internal stimulus that is controlled by the brain.
Planting leafy green vegetables is easy, but itâs all in the timing. Knowing when to plant greens (such as spinach, kale, and lettuce) depends on your climate and if the leaf vegetables are heat- or cold-tolerant. Greens grow year-round in areas with mild summers and winters, such as the West Coast. For most other areas, spring and fall are the best times to grow greens.
Sow green beans in the garden just after the average date of the last frost in spring. To get an early start on the season, sow beans indoors as early as 3 or 4 weeks before the average last frost date in spring for transplanting into the garden a week or two after the last frost. For continuous fresh harvest through the growing season, sow succession crop bush beans every two weeks.