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.
Plant mums in a location that receives at least six hours of daily sunlight. Too little sunlight can reduce flower bud production and result in small, weak blooms. Pinch back the growing tips of the mums at two- to four-week intervals from planting until the beginning of July. Pinch each time the mums grow to about 6 inches high, reducing the stem length to about 4 inches.