 tip 5 simple conservation outdoor tips 5 simple water saving tips  water an established lawn 1 inch per week  a bit more in hot dry weather trees shrubs and perennials typically need even less water water before 10 am or after 6 pm when temperatures are cooler and the air is calmer adjust your sprinklers so that they re watering your plants and lawn and not the sidewalk or street  group plants with similar water needs  different plants need different amounts of water sun and shade to survive make sure your hose has a shutoff nozzle  a running hose can use up to 10 gallons per minute  