And you plant more and start the fun all over, hoping next time will be even better and problem free.They're annuals, and have a season...then they die.
I think he means why you can't flower, pick the buds off..and then leave the plant to flower again next year. This IS possible, but some claim the yields/potency go down...and it isn't worth the time and effort to trim/force back into veg when you could just start another plant.