The anagen stage averages at about 1,000 days but can range from 2 years up to 6 years. The anagen phase is when your hair is actively growing from your hair follicle and out of your scalp. For those of us who can't grow their hair very far past their shoulders, it is because your anagen phase is short and most likely lasts for 2 to 3 three years only.
 
For those of you with a short anagen stage, stick to hair treatments and trims every 6 to 8 weeks to keep your hair in good condition so that no breakage occurs while the short anagen stage is taking place.