This year I had one lonely little heavenly blue that got left in a 4" pot and forgotten about behind a bunch of petunias. The only reason I discovered it was that all of a sudden there was this huge blue flower peeking out from among the petunias.
That was back in September, which is usually when my MGs are at their best. So, yes, perhaps a bit of benign neglect might get you flowers sooner so you can enjoy them longer. Quick, take pictures before that frost!