It sounds like your friend had an autoflower, where the plant doesn't rely on day/night cycle length and begins flowering sooner based on age. The terracotta pot won't impact it much unless it was too small. I always plant in 3 or 5 gallon fabric pots, transplanting once the plant solidly roots in a 1 quart container.
You'll want photoperiod strains instead of autoflowers if you're growing outside with the seasons. I'd string up some support nets around the plants and train them in the vegetative state so you get lots of branches before it flowers.
