So here is a post from awhile back,Tower poplars have shallow roots that seem to go across yards about 12 inches under the soil. They also sucker. Swedish aspens are cousins to the poplar. They grow just as fast, do not sucker and have deep roots (they last longer) which do not skim across yards. In my town, neighbours get quite upset when Poplars are planted. Aspens, because of all the benefits, cost about three times more than Poplars. If you want fast-growing trees, without spending so much on Aspens, the Morden Research Station here in Morden Manitoba has "created" a different type of Poplar called "Prairie Sky". It has all the benefits of the Aspen, but the cost of Tower Poplars. They also grow wider than Tower Poplars, so you do not need as many for a shelter belt or screen. Check them out! I just bought 46 18-inch Prarie Sky Poplars for $2.25 a piece to provide a "fence" around the back of our yard.
i have been searching and looking the difference between the two trees and both are saying that they sucker but n your post here it states that the swedish aspen are non-suckering can you please confirm this