12/31/2023 0 Comments Royal red norway maple vs crimson king![]() We used to be able to plant some native maples in urban landscapes decades ago…until residential properties became so small and were graded with such poor soils that many native species will not survive, or will never reach their full potential and often become a hazard. Many horticulturalists are concerned that there is insufficient scientific criteria used to classify these as “invasive species” and hope that there will be exceptions where appropriate. Some of these are key urban landscape and green roof plants. Part of the strategy includes efforts to stop the production and sale of several commonly used ornamentals in Ontario. Most recently, the Invasive Species Act was developed to help reduce the spread of invasive species. There are some groups that feel it should be illegal to grow and plant Norway maples here in Ontario. Norway maple (Acer platanoides), the original species, developing seed.Īs you know, the Norway maple species has become labeled as an invasive species in some parts of North America. The problem is that the uncultivated (original) species produces large amounts of seed and those seedlings are very shade tolerant and therefore may spread into naturalized areas.įor decades now, North American nurseries have been offering a wide range of cultivars of Acer platanoides, and these cultivars differ significantly from the original species. It was recommended by the ministry of natural resources and grown in their nurseries. Norway maples tolerate pollution, hot, dry conditions and a wide range of soil pH’s which make them a very important and successful street tree, sometimes where little else would grow. The Norway maple ( Acer platanoides) has been a successful street tree, lining several streets and providing shade and habitat in several cities in Canada and the US. We weren’t thinking about how easy we were making it for pests to spread and infest trees along these long, continuous rows. Of course it was a mistake to plant so many of one species (or one cultivar). The ash tree was a popular and drought resistant species…until emerald ash borer came along. Our streets used to be lined with gorgeous, vase-shaped elms…until Dutch elm disease came along. ![]() Acer platanoides ‘Crimson King’ (When you consider all of the trees that are grown for street plantings in the urban landscape, you will quickly come to realize that the number of possibilities can be quite small because of poor soil conditions and exposure. ![]()
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