15 years later we're still trying to keep them at bay and we need to protect the native trees we've planted from being overrun by them. Step 5 - Continued Care. They create a dense shade, under which other species cannot survive, hence my naked garden beds. There, with their own heavy canopies, they shade out native wildflowers. Anyone out there find just cutting the tops off is adequate? Explore this online platform for Chicago-area residents to share their favorite stories about trees. Norway maple populations overwhelm sites by displacing native trees, shrubs, and herbaceous understory plants, and once established, creating a canopy of dense shade that prevents regeneration of native seedlings; it … I have a crimson king Norway and my neighbor has an Emerald Queen variety. It can range form yellow-green to a nice yellow. Answer Save. It did indeed lose a large branch full of leaves during an early snowfall and this fell on the edge of our garage roof damaging it. The Norway maple (Acer platanoides) is widely planted in landscapes and along streets. I have one right in front of my bedroom window, and I love it. One of those falling branches would hurt them badly. Use up and down arrow keys to explore within a submenu. These can become a nuisance, especially if they clog gutters and down-spouts or germinate in garden beds. Its shallow roots make it prone to blowdowns. The two wings of a Norway maple seed spread at almost a 180 degree angle from each other, while those of a sugar maple hang down together at a much narrower angle. In the wild, Norway maple shades out native plants. As your maple saplings grow into proper trees, be prepared to prune and care for them. The following menu has 3 levels. So, they may not give you the yard you had hoped for but can do their part to save the planet. The native sugar maple is a weak species; filling with rot even while young. Seed of the sugar maple (Acer saccharum) should be stratified for 40 to 90 days at 33 to 41 F, while seed of the Norway maple (Acer platanoides) require 90 to 120 days at 41 F. Plant the seed (fruit) 1/4 to 1 inch deep. The Norway Maple is botanically called Acer platanoides . Sugar maples, bigleaf maples, boxelder maples, Japanese maples, Norway maples, and some red maples lie dormant over the winter, then germinate as soon as temperatures warm. Neither shape of your neighbor trees nor leaves resemble Norway maple. Norway Maples continue to be sold throughout the country as ornamental shade trees. Most know the attractive leaves of Vermont’s state tree, the sugar maple (Acer saccharum). Leaf fall at other times of year, however, can signal other problems for maple … Every year I try to fill in these beds, and every year I watch in sadness as everything dies. So I’m going to start a new series in which I highlight a specific invasive plant, where I’ll discuss what makes that plant such a problem and how we can eradicate them from our landscapes. Then in late November, or December, the leaves drop. This maple tolerates heavy shade, so establishes well in woodlands where birds drop their seeds. However it is not often grown commercially due to problems associated with grey squirrels, which strip the bark. Some of the helicopter seed pods of these trees found their way into the backyards and sprouted and are now full-grown trees. If I leave the leaves (and don't rake), they never seem to decompose!! But I can count on one hand the Norway sprouts I have located. Please do not ever intentionally plant this tree! One of their key advantages over native maples is that they can thrive in much lower light conditions. They are evil weeds! Any tree should be properly cared for. Make your favorite salad, then add the seeds as a finishing touch. Advertisement When maples suddenly drop their leaves in June or July, it's usually due to drought, a sudden change in temperature or insects like scale, aphids or a specific wasp larva that burrows into the leaf petioles. We have 2 maple trees right next to each other and one is starting to drop a lot of leaves and it is only July 19th.