From earlier posts it appears you’re in Atlanta... the African Violet Club has folks that grow many types of gesneriads including Streps and Kohleria. They meet each month and have a learning program and plant exchange. Later this year they have a program specifically on growing Kohleria. Search MrsStrepStreps on eBay. She is local lady that sells healthy and a large variety of Streps, Primulina, Kohleria and other gesneriads. She is always willing to share her expertise on growing these beautiful plants. This is a Kohleria I got recently. Beautiful and easy to propagate. It’s called Peridots Rolo.