Fertilizing will encourage new growth that will not harden off in time to avoid winter injury. To discourage mites, hose dust from evergreens, leafy shrubs and hedges. Mites are hot weather pests that thrive on the dusty undersides of leaves. They suck plant sap and make leaves look yellow. Daily harsh water sprays will dislodge dust and mites, preventing a build-up of either.
Weeds compete with desired plants for nutrients and water.
Side dress vegetables and annual flowers with fertilizer. Always follow label directions exactly. All annuals and many perennials will continue to flower after dead blossoms are removed. Keep faded flower blossoms pinched off. Pull out and destroy tomato and potato plants that are infected with bacterial or fungal leaf spots before the problem spreads.