If the water begins to run off the surface, turn the force flow down to a mere trickle. Use a soaker hose weekly for shallow rooted trees. In nature, redwoods, for example, rely on fog trapped in the leaves to drip down onto the shallow roots. Water trees in lawn areas with a tree and shrub watering spike to force roots deep into the soil. Trees grown in turf areas will grow roots only near the surface if irrigation sprinklers are the only source of water.
Trees have a better chance to repel insect pests if there is sufficient water to form sap.
Drought causes stress for all plants and should be counteracted if possible. Inc. How things get done. Use of this Web site constitutes acceptance of the eHow Terms of Use and Privacy .