When Jack accidentally trashes Mom’s roses which she’s been growing especially for today’s flower contest, Jack talks the kids into using a super?strong alien fertilizer cube to fix them, but neglects to mention that the fertilizer has an adverse reaction when mixed with water. The kids race to retrieve the roses from the flower show and inadvertently fertilize and then water a Venus Fly Trap instead. Now there's a huge carnivorous plant running amok that has just eaten Rocket, and the flower show's about to start.