My coleus seedlings are sprouting. To guard against damping off diseases I keep the seeds spaced apart. I have found in the past that crowding seedlings invites disease.
Coleus seeds, among many others, are smaller than the head of a pin. Sowing them in neat rows can be a daunting task. To accomplish this with as little frustration as possible I use water and a pencil.
An explanation of this technique can be found here: Planting Small Seeds
Below you will find some samples of last year’s coleus plants: