Watering Trees & Shrubs
Established large shrubs and trees are generally deep rooted plants and usually can find water /moisture for themselves and rarely need watering.
Applying a generous amount of organic mulching material around the base of plants will help to slow down transpiration plus keep any weeds that are also using moisture at bay.
Recently planted shrubs and trees will need regular watering until they have created a healthy root system.
Provided there is no hosepipe restrictions in place, watering with a hose/seeping hose/sprinkler is the simplest method of keeping them well watered throughout the summer.
In the event of a hose ban, use waste washing up / bath water from the house.
When small shrubs become established, they can generally find water for themselves, and rarely need watering.
As with large shrubs, applying a generous amount of organic mulching material around the base of plants will help to slow down transpiration plus keep any weeds at bay.
If they should droop or show any other signs of stress give them a good soaking in the early morning or evening when the sunlight is off them.
Most perennial plants, particularly the woody stemmed types can be treated like small shrubs.