Hi Dimych! Each croton has male and female flowers that can be pollinated by ants- or humans (they are dioecious)! If you want to create a new hybrid, you take the male flowers from an inflorescence, find the croton you want to hybridize it with, and rub the pollen from the male flower onto the female flower. Soon, the flowers turn into small, round nodules that will contain several oval seeds inside. When you see these seed pods forming, you cover the inflorescence with a little mesh bag or something because when the seeds are ready the seed pods explode and cast the seeds as far as it can. You have to have something to catch them. Then you plant them and hopefully, you get something you like. The truth is, it takes many, many ugly plants to get one that's a star. Like out of 100, you might get one or two if you're lucky. It's a lot of work! Also, the flowers occur at different times on different cultivars, and you have to beat the ants to them (the ants find them quickly and pollinate them if you're not fast). Another problem is you might want to hybridize two plants, but if one isn't blooming, or doesn't have the right sex bloom, you have to find another that's receptive.