The Corporation of The City of London
July 10, 2012
FOR IMMEDIATE RELEASE
Tree watering alert now in effect
Due to soaring temperatures and over 18 days only 1.5 cm of rain, the City
has issued a tree watering alert. Londoners are being asked to water new and
mature trees on private and City property.
All trees, big and small, need at least 2.5 cm of water per week in order to
"Although we did receive rain last week, it wasn’t enough to maintain the
regular biological functions of trees: to build new buds cells; ensure root
growth and build up energy reserves to prepare them for the winter and next
spring's growth," says Ivan Listar, Manager of Urban Forestry. "Trees weakened
by lack of water make them less resilient in the long term."
Drought is the major cause of tree stress and can lead to permanent damage,
especially in young trees. Lengthy periods without rain - typically a week or
more - can lead to the most common symptoms of stress appearing, including
browning and wilting of leaves. Sometimes the symptoms of drought stress are not
visible until the next year, when they appear in the form of insect attacks and
“We’re always encouraged by the response of Londoners to our tree watering
alerts in times of drought,” says Andrew Macpherson, Manager, Parks Planning &
Design. “We thank everyone who helps care for our urban forest, and this year
would like to give special recognition to the groups who have joined the
Veterans Memorial Parkway Community Programme in ‘adopting’ sections of the
parkway - most notably: Trojan Technologies, 3M and Starlim Canada.”
When watering trees it is important to soak the soil slowly around the tree
continuing out to the outer branches to ensure all the roots get moisture. To
make optimal use of water, early morning or evening watering will reduce
evaporation loss. The cost to water a tree is less than a quarter per week.
Please remember the City of London Water By-law W-3 is in effect until August
31. If your street address ends with a 0, 2, 4, 6, and 8 you can water outdoors
on EVEN numbered calendar days only. If your street address ends with a 1, 3, 5,
7, and 9 you can water outdoors on ODD numbered calendar days only.
Did you know?
Unlike grass, trees do not go dormant during times of drought – they continue
to try to grow. We need to water our trees before watering our lawns to avoid