This morning I have sown seeds of Mirabilis and Balsam that were collected from the garden about three years ago. As I remember they were both large and colourful flowering plants which I thought would self seed. I came across the seeds today so decided to try them. I have listed the links to the original page when I first bought the seeds. Update on 15th March, six days after sowing and good signs of healthy germination.
https://www.citychickens.co.uk/2017/02/27/miribalis-jalapa-marbles-mix/