This grower is sure of this plant identification.
Forms a trunk like stem, good for Bonsai.
Plants in 6cm pots
Plectranthus genus (Soup mint). This genus consists of around 350 species.
You will need to grow in light gritty very well-drained soil in full sun. Some are tolerant of light frosts but prolonged cold and wet conditions can lead to rotting. Cut back tips in growing season if plants become too straggly.
Grown for their foliage and flowers.