4 months of veg!? god damn man, i did that with a girl, and it was started indoors (tie down ) and then brought outside. By the end of the summer it was 7 feet tall, and yielded over a lb... when we harvested, we had to make 2 wheelbarrel trips..
I said 100g but its impossible for me to tell without some pictures. Timeframe of growth means very little without knowing of watering and nutes added and used.