The oldest are now 2 1/2 years old (that's DD's Delight and two others, one of which is beginning to bloom), but I have started a few seeds here and there since then. The Kathryn's Fuchsia Fantasy is now a 2 year old, and has been in almost constant bloom for 9 mo. I started a handful last fall and those seedlings are now 6-12" tall. I am just beginning to start some seeds from K's FF and have two seeds that have germinated so far. She was the first plumeria I have ever had that produced seed-pods, and I have grown plumeria for almost 25 years. I am looking forward to see if these seedlings from her will be as record-breaking as the "mother" seedling. That K's FF bloomed at 14 mo. and produced seed-pods at 17 mo.
I have some seedlings that are now almost 6' tall and are 2 yr. old plants, and their height range from this 6' down to those 6-12" ones.