by Larry Hodgson September 27, 2018 1 Gardening Invasive plants Shrubs Trees Trees and Shrubs That Self-sow Excessively The Norway maple (Acer platanoides) produces so many seedlings it can easily become a garden pest. Source: www.massaudubon.org. All plants reproduce.Continue Reading Share this:TwitterFacebookLinkedInPinterestLike this:Like Loading...