My luck is such that I would go to great pains to make this "tape", and end up with sprouts all willy nilly anyways. Lol! But the theory seems sound enough. I'd probably go with maybe 2-3 seeds per dot, and then thin once or twice depending on the germination rate. My last carrot plot had way too many clumped together in each hole and no neat rows. I was too lazy to thin all of that.