Keep an eye on natural rainfall and water your garden as necessary. This hose has pin size holes on one side. Place the hose in the garden or flowerbed with the holes face down for about an hour. The water will penetrate to the roots with no evaporation or waste. Keep your grass taller in hot dry weather.
Taller grass means less evaporation and less crab grass, as crab grass thrives in shorter cut lawns.
Keep your lawn and garden weed-free. Cultivate soil regularly to keep it loose. You'll use less water because it will penetrate more rapidly and deeply. Put a layer of mulch around trees and plants. Wind can blow water away from cultivated areas and onto concrete and asphalt where it's not needed.