Populus tremuloides, or trembling aspen, is native to Ontario and a great addition to naturalizing areas due to its support for wildlife, including birds, mammals, and butterflies. It thrives in moist, well-drained soils, tolerates a range of conditions, and is known for its unique "trembling" leaves. However, it�s not recommended for residential areas due to its extensive root system, which can sprout new trees, and its weak wood, which can pose safety risks.� Aspen is also messy, shedding numerous leaves in fall and producing cottony seed fluff that requires frequent cleaning.