Ornamental trees are chosen for the beauty the tree can add to your yard. The beauty often comes via spring flowers and vivid autumn foliage. But there are some ornamental trees that also change color during summer, which gives you an added season of visual interest to look forward to. Keeping the trees looking beautiful all year long requires diligence and understanding the threats that each type of tree faces. 

Here are two ornamental trees that bloom during summer and how you and a tree service can keep the trees free of diseases that could threaten the summer beauty.

Red Japanese Maple Tree

The red Japanese maple tree is a modest sized ornamental that has distinctive leaves that are more beautiful than many flowers. The leaves can start the growing season greener in color but by summer have taken on a reddish purple color that persists until fall when the red deepens before the leaves fall off.

The two most common Japanese maple diseases are both fungal in nature: verticillium wilt and canker.

Verticillium wilt will cause the lovely, distinct leaves of the Japanese maple to prematurely yellow and fall from the branches. A good sign that wilt is the problem is that the yellowing will start either at the top or on one side and work its way through the tree in the opposite direction. The bark can also become discolored as the disease spreads.

Wilt is best treated by hiring a tree removal and trimming service to remove the affected branches as soon as the leaves start to prematurely yellow. This is the best chance at stopping the disease from spreading. Otherwise, you might simply have to deal with a naked maple tree until the spring growing season.

Canker disease can also cause the leaves to yellow and fall but open sores will also form on the bark of the maple. The sores can sometimes ooze a smelly material. The canker is best treated the same way as the wilt: tree trimming early in the diagnosis.

Washington Hawthorn

Washington hawthorn trees are larger, dense ornamental trees that are valued for the year-round visual interest and the ability to serve as a living privacy fence during the warmer months. The hawthorn has white blossoms that bloom in both spring and summer plus green leaves that turn bright in fall and red berries that stay on the tree year-round.

The hawthorn is vulnerable to a couple of tree diseases that can affect the tree's beautiful foliage: fire blight and cedar-hawthorn rust.

Fire blight causes the hawthorn's white flowers to darken, die, and then drop to the ground. The accompanying leaves may also darken but tend to stay attached to the tree. Cankers can form on the bark in the affected areas. Blight is most pronounced in overly wet weather and on trees that have already suffered some type of bark damage.

Blight treatment requires dry weather and the aid of a tree trimming service to trim away the affected areas without further wounding the remaining bark.

Cedar-hawthorn rust causes yellowish or orange dots to form on the leaves before the leaves wither and die. A tree service or landscaping service can treat the rust with topical fungicides.

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