Alberta,
I'm not familiar with Trudi, so I'm not sure what her method is. I just sow in containers and place out on the deck for 2 or 3 heavings, then bring them in under the grow lights. I bring them in because I just can't stand it. Ants in my pants.
Last year, I got about 75 plants going this way and saved myself quite a bit of money in the process. I'm going to try doubling that this year.
I think I set foot in a nursery about mid August last year..to buy some sale shrubs. The owner looked at me and said "Where have you been? Have you been sick?" LoL