As someone who has started lisianthus from seed the last serveral years I can confirm. Yes it takes MONTHS! I start mine the beginning of Dec for planting out the end of April. They r fussy about the right conditions to germinate so not a plant for the faint of heart to start. Here in zone 4 with our short season if I winter sowed they would not be big enough to bloom by the time frost came along and killed them off.
I start my own because I’m an outdoor girl at heart and winters get depressingly long for me. I need an excuse to start growing something green inside awhile. plus if you tell me it’s to hard to grow indoors now I need to figure out a way to prove I can 🤣
Fun fact: you can save lisianthus seeds. You may not get exact replication of the parent plant but the first generation is most likely beautiful! Attached pic is a lisianthus from seed. Saved from the voyage series. It has the form of the voyage parent but the coloring of the white and purple “father”