I recently moved into a house on Skeena Street, near Hastings. The streets are lined with very large trees, maples are running down Skeena. All of the garden beds that are around my house are thick with roots, and appear to out competing all the perennials planted there, even the 4 foot tall beds up close to my house. After a little research I am assuming they are silver maples as they seem to be the most root invasive. 2 questions: Is there a way to confirm with the city which type of maple they are? Is there any type of ground cover, or possible ornamental grass, or perennial that can survive with these type of conditions under big maples? I am aware that my only option may be a redesign with containers or protected beds to keep the roots out. Thanks for any help you can give me!