Other methods of weed control in the home landscape include hand pulling, mechanical cultivation and the selective use of herbicides. Many plants require more nutrients than can be obtained from the native soil. Nutrients are added in the form of fertilizers. Most fertilizers include nitrogen, phosphorus and potassium. In the spring, plants put the extra nutrients into increased top growth.
New growth is undesirable just before a period of drought stress.
In the fall, most plants put extra nutrients into root growth, which increases the plant's ability to locate and take up water. Use mulches to conserve soil moisture. Rake organic mulches to prevent crust formation. Under inorganic mulches, use a weed control mat that allows water percolation. Control weeds that compete with desirable plants for water.