If you move forward with planting one, be vigilant in watching for seedlings to spring up during the spring and pull them up to prevent this tree from spreading. If you're in an area where it's not unlawful to plant them, it's your decision whether to heed that advice. The Center for Invasive Species and Ecosystem Health advises against planting Norway maples. Less sweeping bans exist in some other places, such as in Portland, Oregon, where the local government has banned planting Norway maples on city-owned property. For example, it's against the law to plant any kind of Norway maple tree in Massachusetts and New Hampshire. Some places go beyond declaring these trees to be invasive to actually outlawing them. As a result, they're considered invasive in many places, including the Pacific Northwest and in the eastern United States from as far north as Wisconsin and Maine and as far south as Virginia and Tennessee. Many Maple Trees, such as the Norway Maple Tree, Red Maple Tree, and Silver Maple Tree, are popular for their moderate to fast growth rate, sometimes gaining as much as 5 feet a year. Norway maples grow quickly and spread rapidly, becuse they produce a lot of seeds that germinate easily. With over 120 different species of Maple Tree, there is one to suit the needs of American landscapers. For that reason, it's a good idea to consult a professional arborist to help treat borers.Ĭrimson king is a type of Norway maple tree. There are several types of borers you'll need to know what kind of borers are doing damage to treat the tree. They usually only attack trees that are already distressed and may prove fatal to the tree if left untreated. Borers: If you see small, rounded holes and sawdust-like residue on your tree trunk, borers are the likely culprit.This is primarily a cosmetic problem you can help to control them by spraying with horticultural oil. As with aphids, natural predators play a role in keeping cottony maple scale (and other scale insects) in control. Cottony maple scale: If you see small (between 1/4 and 1/2 inch long) cottony egg sacs on your tree, that's a sign of cottony maple scale.Predatory insects usually help keep the aphid population under control, though you can also spray with horticultural oil to help repel aphids. They have a lot in common, they are similar sizes and have similar native distribution. ![]()
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