No it should be fine. If you are at all concerned though you can sow in trays and transplant when large enough. I tend to do this as I don't need along rows of either, just a dozen or so plants of each.
If you are going to grow in the open ground, just add some fine compost to the drill and to cover them, so that the surface of the soil doesn't "cake" as it dries and prevent the seedlings from getting through as they germinate