u/Gloomy_Pomelo49

I am crocheting a blanket using moss stitch. Now that I've gotten a lot further along, I realized I wish my first section was longer (I'm using three colors, pattern involves long section of color A, alternating rows of A and B, then long section of B, alternating rows of B and C, etc.). I'd like to add some extra rows for my first color block but would rather not have to frog the whole thing. Is there a way to add rows onto the beginning?? Or do I just have to live with my decision if I do not want to frog it?