A new and distinct cultivar of Dendranthema plant named ‘Snowy Igloo’, characterized by its upright, outwardly spreading and uniformly mounded to almost spherical plant habit; freely branching habit; dense and full plant form; uniform and freely flowering habit; decorative-type inflorescences; white-colored ray florets; natural season flowering occurs about September 13 to 23 in Pennsylvania; and good garden performance and winter hardiness.
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