Spray when the weeds are actively growing. Now is a good time. It only takes one to two ounces in a gallon of water. Keep your eye on your tomato plants. Sometimes they disappear.
Cutworms are famous for cutting off the plants right at the base.
Squirrels, rabbits or even deer have been known for eating your prize plants. Plant gladioli, calla lilies, cannas and tuberous begonias. Pinch azalea and rhododendron blossoms as they fade. Fertilize azalea after bloom. Use dry grass clippings as mulch in your vegetable or flower garden.