Mole Repellent - Gardens Alive! Dry Mole Repellent Keeps moles from spoiling your lawns beauty! Easy to apply by hand or with a broadcast spreader. Can be applied on wet or dry lawn; apply in early spring and fall. Biodegradable formula drives moles away for up to three months without harsh synthetic chemicals. Not harmful to birds, pets or plants and wont yellow lawns or foliage. One 2.5 pound bag covers 2,500 sq. ft.