Gladiolus needs full sun for the upright growth the plant is known for. "When the corm is placed in full sun, the stem of the plant is encouraged to grow straight up for a colorful, architectural ...

In fact, the root of the plant isn’t a root at all, but an underground stem called a corm. Those corms can vary in color from creamy speckled white to yellow, red, and green, though purple taro ...