Keep in mind when planting that Chinese purple is thought of as tender, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside.
Growing Chinese purple from seed
Start seeds indoors six weeks before last frost date.
Transplanting Chinese purple
Plant to the first set of true leaves to promote strong root growth.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Chinese purple is a tender plant.