Those cuttings are DD's. I am done with wintering plants.Many of the containers will have perennials and lilies so I wont need as many coleus next year.
hmmmmm. I cant be much help.
In the past I just took the cutting and stuck it in a yogurt cup filled with potting mix. I didnt water much after the first drooping was over.
They take root in about a week. I let them dry a bit duering the winter in my lvingroom window.