There is no strain that will grow from seed to harvest in 7 weeks.......more like 12-14 weeks minimum, no matter what the breeders say.
4 weeks of veg and 8 weeks of flowering is about as fast as it gets.
None are 7 weeks from seed to finish from seed to flower in around 5/7 weeks and then flower is 2 weeks stretch and then probably 7/11 weeks flowering so around 14 weeks min I would say
an old school autoflower but they yield is small. So would want to SOG or sea of green with them. Could also shock them into early flower by transplanting them.