Focusing primarily on both the understanding of our natural and man-made environments, environmental science degrees draw from diverse fields of studies and require a strong background in the more traditional sciences: biology, physics, chemistry, geography, ecology, and even biotechnology.
When and how to pinch back mums. If you decide to prune your mums, you can start pinching stems in spring when the plants have reached a height of about 6 inches. To pinch them back, simply grab a stem between your thumb and index finger about 2 to 3 inches above the base of the plant and just above a leaf and pinch it off.
You may opt to wait and cut mums back in late winter or early spring when new green growth emerges or cut the plants back in late fall or early winter shortly after they finish blooming.ou may opt to wait and cut mums back in late winter or early spring when new green growth emerges or cut the plants back in late fall or early winter shortly after they finish blooming.