A good source of nutrient for the fall feeding is provided by the mulching of leaves. pH is an important factor because, once again, no landscape can be nutritionally sound without proper pH. Plants begin to gear up for winter by storing energy from the summer in their root systems. Lawns, trees and shrubs need to have the maximum amount of stored energy and nutrients to survive the winter. Large trees, ornamental trees, shrubs, perennials, lawns and ground covers all need different levels of nitrogen, phosphorus and potassium. Proper pH and organic fertilizer insure a healthy spring. Winter damage and disease are significantly reduced when a plant is nutritionally sound. Compost is also a great nutritional source providing plants with disease resistance and organic nutrient.