A new Dahlia plant particularly distinguished by yellow flowers and an upright habit, is disclosed.

A new cultivar of Dahlia plant named Mystic Wizard that is characterized by an upright and uniform growth habit, dark grey-green compound leaves, purple ray florets with involute cuspidate tips and red-purple disc florets with yellow styles and orange pollen.

A new Dahlia plant particularly distinguished by yellow flowers and an upright habit, is disclosed.

A new and distinct cultivar of Dahlia plant named BKDAMAGRB, characterized by its broadly upright plant habit; moderate basal branching habit; dense and bushy growth habit; large dark green-colored leaves; and large decorative type inflorescences with white and red purple bi-colored ray florets.

A new and distinct cultivar of Dahlia plant named BKDAMAGFR, characterized by its broadly upright plant habit; moderate basal branching habit; dense and bushy growth habit; dark green-colored leaves; and large cactus type inflorescences with yellow and red bi-colored ray florets.

A new and distinct cultivar of Dahlia plant named BKDAMAGPU, characterized by its broadly upright plant habit; moderate basal branching habit; dense and bushy growth habit; dark green-colored leaves; and large decorative type inflorescences with red to red purple-colored ray florets.

A new and distinct cultivar of Dahlia plant named G14402DAHL, characterized by its upright and mounding plant habit; vigorous growth habit; freely branching habit; dark green-colored leaves; early and freely flowering habit; and large semi-double type inflorescences with greyed purple-colored ray florets.

A new and distinct cultivar of Dahlia plant named Dahlgr152, characterized by its upright, mounding and dense plant habit; freely basal branching habit; dark green-colored leaves; early and freely flowering habit; single-type inflorescence form; large inflorescences with light purple and white bi-colored ray florets; and good postproduction longevity and garden performance.

A new and distinct cultivar of Dahlia plant named Dahlgr50, characterized by its relatively compact, mounding and dense plant habit; freely basal branching habit; dark brown-colored leaves; early and freely flowering habit; single-type inflorescence form; large inflorescences with bright red-colored ray florets; and good postproduction longevity and garden performance.

A new and distinct cultivar of Dahlia plant named Ferangel, characterized by its compact, upright and mounding plant habit; moderately vigorous growth habit; freely branching habit; dark green-colored leaves; freely flowering habit; and double type inflorescences with white-colored ray florets.