How Far Back To Cut C Terniflora and Platycodon Grandiflours In Fall

Question From: i. feigenbaum - NEW YORK
Q: How far back do I cut the following in the fall: C. terniflora and platycodon grandiflours.

A:

Irwin, If you choose you can cut the P. g back to the ground, or not. Need to know what the C word is. Happy Yardening, Nancy