To do this I mix half peat moss and half perlite for my soil. It is spread into my growing tray. Sometimes I fill the tray all the way and then poke holes where I'm dropping the seeds. However, this time I only filled it most of the way and then sprinkled the seeds on top. Then I covered it with a thin layer of soil.
The great thing about calendula is that it starts growing quickly. This is less than two weeks growth. They are ready to separate.
To separate the seedlings, remove them from their tray and gently pull the plants apart.
By fall these seedlings will have produced the flowers that will be made into and herbal balm.