How to Prune perennial phlox 'Lichtspel'?
Deadhead to prolong flowering, then cut down to the base in late autumn

perennial phlox 'Lichtspel' · Phlox paniculata 'Lichtspel'
Grow in fertile, moist soil in full sun or partial shade
Deadhead to prolong flowering, then cut down to the base in late autumn