* planted many mixed mounding Asters around my walkways last fall in colors of red, white, blue, pink. These are all supposed to be only 18 - 24 inches tall and mound spread alike by bloom time. The white are 29 - 37 inches tall already and the crimson red are 24- 27 inches tall. Barely mounding yet . Pink and blue are in the normal range. Can I prune back the white and crimson red Asters to get them to be within the same height as the others are? Or my border is gonna be just way out of control around my walkways?
* planted many mixed mounding Asters around my walkways last fall in colors of red, white, blue, pink. These are all supposed to be only 18 - 24 inches tall and mound spread alike by bloom time. The white are 29 - 37 inches tall already and the crimson red are 24- 27 inches tall. Barely mounding yet . Pink and blue are in the normal range. Can I prune back the white and crimson red Asters to get them to be within the same height as the others are? Or my border is gonna be just way out of control around my walkways?