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What tree/shrub would look good behind a row of 10 blue spruce pine trees in our backyard which is by a road?

Our backyard is next to a road which is busy. I was wondering what tree or shrub would be good to place behind the pine trees. Storms come in from our backyard so whatever it is they have to be strong.
I live in WI, cold winters and hot summers. Is it ok to plant whatever I get this fall or next spring?

I used "Flame Willow" Salix alba 'Flame', to accent my blue spruce. They get 15-20ft. and have light green-yellow leaves and the brightest red-orange-yellow twigs and branches in winter. They really do look on fire and are awesome with the blue. RScott

Moses Malone Signed Utah Stars ABA ROOKIE 1975 Authentic Road Royal Blue Jersey $222.22 Time Remaining: 6d 9h 14m Buy It Now for only: $222.22

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