My first Croton seed germinated barely a week ago and more are popping up! Even though I know the seeds came from my colorful Codiaeum variegatum, I can’t be 100% sure the seedlings look like their mother. So I’m going to assume that these are hybrids until they grow up. I’ll most likely end up with a pot of very different plants.
It took them 2 weeks to germinate in a pot with moist potting soil, wrapped in a plastic bag to keep humidity high. I added a top layer of diatomaceous earth after germination to prevent gnats from laying eggs in the soil. 4 out of 8 seeds have germinated so far and two of the seedlings have just opened their first little leaf set.