Parsley seeds are slow to germinate, often 3 weeks. A tip is to mix a little lettuce seed in between the parsley seeds, so you can clearly see where the row is. Parsley seeds can also be sown in trays indoors, or you can buy a tray of small parsley plants from the nursery. The parsley plant is 2 years old, so leave the plants over the winter, and you will have parsley early next spring. When the plants start to flower, remove them and you will hopefully have sown something new.