Shade tree wanted, what, when and how should I plant?

A:

From Amy Jo Detweiler, Horticulture Faculty:

The WaterWise plant guide has a shade tree section, see especially planting instructions on page four.

One of the best types of shade trees include Norway Maples. There are several different cultivars some more widespread than others. The red maple and red maple hybrids can also be used. Schubert Chokecherry is another one you could consider. Red Oaks are also good shade trees for Central Oregon.

From  Susan Preston, Master Gardener:

Fall is a good time to plant before the first freeze. Soil preparation is very important to ensure that your tree gets a good start in this climate. Once your tree is planted, be sure to water the tree well before winter, deep soaking before the ground freezes. It is recommended that you water every 6-8 weeks throughout the winter if there is no snow cover and the ground is warm enough to accept water.

Protecting your new tree from sunscald is also important. Maples are thin barked trees and are more susceptible to sunscald. Wrap the trees in November and remove the wrap in April. Do not leave the wrap on in the summer, as it can harbor unwanted insects.  

Sun scald is less prevalent in the summer, as shade tree trunks are protected by the shade of their leaves. Once the leaves have fallen, the bark is more exposed to the effects of the sun. The Pacific Northwest Plant Disease Management Handbook provides the following information about sun scald:

Sun scald occurs on sunny days in winter when the bark of a tree is warmed by the sun, especially on the southwest side of the trunk. The bark and cambial tissues deacclimate and are not able to re-acclimate quickly enough when the sun sets and the temperature drops abruptly. The result is damage or death of tissue.

The bark often cracks open, or it may separate from the tree without splitting. Sun scald is more prevalent on stressed, recently transplanted, smooth- or thin-barked trees. Recently transplanted trees and those that may have been stressed during the growing season should have their trunks wrapped with a light-color wrapping from the soil line to the first set of branches. Leave the material on for the first winter and the first growing season.

You can purchase tree wrap at a local nursery or hardware store.

Enjoy your new tree!

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