’Souixland’ (male) Grow 40–80” in height with a broad open crown of widely spreading branches. Lustrous, bright green foliage changes to brilliant yellow in fall. They grow particularly well along lakes, rivers and in marshy areas. The trees prefer sandy or silty soil, but will tolerate most anything. Cottonwood trees are the fastest growing trees in North America. A young tree can add 6 feet or more in height each year. Cultivars are seedless males. State tree of Kansas! NATIVE TO THE EASTERN TWO THIRDS OF THE U.S.