@Denman55 - Patrick, I sowed my Flanders poppy seeds in early May (might have been the last week of April...I'd have to go back and check my garden notes). Since you are in zone 7a, you are about a month, maybe even a month and a half ahead of me, so I would guess that you would want to plant them in late March or early April, assuming you choose to plant in the Spring.
I planted mine in a raised garden bed that I had filled with a mix of compost/topsoil/peat. They went bonanzas! It was the beautiful pop of red in my vegetable garden that I wanted and it did not disappoint.
Question for everyone else: are Flanders Poppy seeds edible? Or are they not considered an edible variety? (The seeds I harvested were so TINY that I almost wonder if it would be worth it even if they were edible, but I'm still curious.)