Hi Cindy and All,
We have at least four different clones of campanulata from TC , (two of which we know the gender-a male and a female-now, get them to flower together...).
Marc lives about a half hour drive from us, so if he grows them under lights I can't believe he has them outside. It would be excruciating heat and Marc would not do that-he's too much of a veteran grower. Our summers do get hot, but our greenhouse grown plants did not suffer from heat...in fact, they produce their best pitchers during summer. We grow them in our Cypress Mulch/sponge rock/ perlite mix and they do fine. Conditions are bright, warm and always humid. Very typical. We do nothing special for them.