It depends Evan. Some things like poppies and larkspur work well. But in areas with heavy spring rain(mine), a lot of seeds are washed away. Critters eat a lot of seeds. Those that sprout might all be in 3" and need transplant anyway. Some folks like direct sowing and seem to have great results. I just get better results using my milk jugs. If I have lots of seed to waste, I occasionally do direct sow some things.
Karen