Keep in mind trees and shrubs have different watering needs then the lawn or flower beds.  You may inadvertently overwater and kill your flowers when you water the lawn.   
 
Lawns need approximately 1 inch of water per week to stay green and grow.  Grass actively grows best between 60-75 degrees.  When the hot summer temperatures arrive the lawn turns brown because it is going dormant to preserve itself.  Allow the lawn to naturally slow down in growth which means less mowing.  It is okay to let the lawn go almost completely dormant/brown.  But don't alternate between letting the grass go brown, then apply enough water to green it up, and then let it go dormant again.  This will stress the lawn.  Water thoroughly so the water seeps down into the root system.  Shallow watering doesn't allow the roots to extend deeper into the soil and will brown faster.  Avoid excessive evaporation and decrease the chances of disease by watering in the morning.
 
Conserve water by mowing your lawn higher.  The taller grass will shade and cool the roots and keep the grass from going dormant sooner.  Avoid applying an excess of nitrogen as warm weather approaches.  Help water penetrate the soil better by controlling thatch and soil compaction by having your lawn aerated.
 
Established trees and shrubs as well as some drought tolerant flowers should do reasonably well during dry periods, but a prolonged drought will stress any plant.  Younger plants will need some extra watering attention.  Consider using a soaker hose or drip irrigation for plant beds.  Water your trees and shrubs by placing a hose with a slow stream of water coming out about 6 inches away from the trunk.  Like lawns water in the morning.  
 
Remember -watering the driveway, sidewalk or street is literally money down the drain.

• Do not bring household plastic or clay pots. 
• Dump all soil and remove metal hangers.
• Each garden center is ONLY able to take plastic pots, trays & baskets.