Seems to me I usually start these on the mat indoors. I usually do the perennials in the winter indoors or out in the greenhouse, which gets pretty hot during the day even in winter. I have had one or two self seed, but sowing outdoors won't be reliable. I've never had a problem transplanting them.
As you can see . . . I don't keep records. If I'm particularly sharp that day I'll put a date on the plant label.
