Sometimes the direct approach is the best.
After I moved the hostas out of this small corner bed last week, something was needed to fill in the empty spots, preferably something fast-growing since the irises won't last much longer. These lime-green zinnias called 'Envy' interspersed with some baby's breath seemed like a good combo.
Now that the temperature is warming up, sowing the seeds directly in the ground is a good option, and it couldn't be simpler: sprinkle, press, and water. The zinnias should start to appear in a week or so.