Should I label seeds when I plant them?

In my second installment of battle plant, you can see from the May 2nd picture that both sets of seeds have sprouted. Well, if you look closely you can see the small ones, they are up, but they seem to be lagging behind the bigger ones.

So I'm wondering which is the mint and which is the bachelor buttons. I'm sure I'll find out soon enough, but perhaps I should have labeled them...