A new and distinct cultivar of Astilbe plant named Lovely Day, characterized by its compact, broadly upright and mounding plant habit; moderately vigorous growth habit; dense and bushy appearance; dark green-colored leaves; freely and uniformly flowering habit; light pink-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Perfect Day, characterized by its compact, broadly upright and mounding plant habit; moderately vigorous to vigorous growth habit; dense and bushy appearance; dark green-colored leaves; freely and uniformly flowering habit; dark pink and purple-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Perfect Day, characterized by its compact, broadly upright and mounding plant habit; moderately vigorous to vigorous growth habit; dense and bushy appearance; dark green-colored leaves; freely and uniformly flowering habit; dark pink and purple-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Youandme Forever, characterized by its broadly upright and mounding plant habit; moderately vigorous to vigorous growth habit; dense and bushy appearance; dark green-colored leaves; freely and uniformly flowering habit; purplish red-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Youandme Forever, characterized by its broadly upright and mounding plant habit; moderately vigorous to vigorous growth habit; dense and bushy appearance; dark green-colored leaves; freely and uniformly flowering habit; purplish red-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Happy Day, characterized by its compact, broadly upright and mounding plant habit; moderately vigorous growth habit; dense and bushy appearance; red-colored developing stems and dark green-colored leaves; freely and uniformly flowering habit; white-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Happy Day, characterized by its compact, broadly upright and mounding plant habit; moderately vigorous growth habit; dense and bushy appearance; red-colored developing stems and dark green-colored leaves; freely and uniformly flowering habit; white-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Youandme Together, characterized by its broadly upright and mounding plant habit; vigorous growth habit; dense and bushy appearance; dark green-colored leaves; freely and uniformly flowering habit; white-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Youandme Together, characterized by its broadly upright and mounding plant habit; vigorous growth habit; dense and bushy appearance; dark green-colored leaves; freely and uniformly flowering habit; white-colored flowers on strong, tall and upright peduncles; and good container and garden performance.

A new and distinct cultivar of Astilbe plant named Harvandermeerwhite, characterized by its tall, broadly upright and mounding plant habit; vigorous growth habit; dark green-colored leaves; freely and uniformly flowering habit; pure white-colored flowers on tall, upright and strong peduncles; and good container and garden performance.