It may be a perpetual bush. I found that the top buds were ripe and ready then when I would chop a few for testing the damn thing would pop out a brand new bud just keep on going. The top buds got ripe as the bottom buds were just half way and I probably could have just harvested the tops and kept it going forever. I let a single branch that I had seeded go for 14 weeks and it was still shooting out buds when I chopped it.