Welcome To Plathville season 7 may not be formally renewed, but the next installment of the series could see the illusive eldest Plath daughter, Hosanna Plath, joining in on the show after years away from her family. The Plath family, who have been putting their lives out there in public for years on Welcome To Plathville, has always been missing a few pieces during their time on the series. While most of the Plath siblings have been featured on the series, eldest daughter Hosanna has never been part of the series despite viewers being interested in getting to know her.