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.
When the foliage succumbs to frost, cut the plant back to the ground. Apply a thick layer of mulch (chopped leaves, pine needles, etc.) over the plants. When spring arrives and the threat of frost is over, pull back the mulch and watch your mums rapidly grow.er rule about cutting back mums was that starting in spring she would cut back the main plants about 4 inches....leave a good green base. She would do this 3 times before 4th of July.