Yeah, if you are going for the contest of weedseedsexpress and you have other seedlings growing then i would risk it and top it on top of the supercropping, after all if it works it works and you will most likely win the 200€, but if it fails you can just go into the contest with another diary/plant.
Good luck, hope you get one of the prizes, since there are 10 and not that many participants, if it goes well you basically have a prize guaranteed.
Stay lit growmie.