How to Prune Stokes' aster?
Deadhead to prolong flowering. Tidy foliage in spring when new growth appears

Stokes' aster · Stokesia laevis
Also known as: cornflower aster
Grow in a sunny, sheltered position in a fertile, well-drained soil; liable to rot in wet winter soils
Deadhead to prolong flowering. Tidy foliage in spring when new growth appears