Spyff,
I did the same thing just recently with a 1/2 tray of tomatoes. Luckily I had left a few cells empty and with Potato and Regular leafed varieties I was able to orient it in the right direction.
What I can't get over is how absent mindedly I did it... with nare a thought until I got out the map and noticed PL where RL was supposed to be.... It's tough gettin' old.
Lisa