it depends on genetics, nutes, lights, maturity, new growth. can ya take a pic? how many bud sites do you count. is it just near the main stem? how tall is the plant? ya gotta give us more. and most likely if your three weeks in already and you only see a quarter thats probably all you will get. at this point the buds are just gonna thicken up. if ya want to help it add some molasses or syrup to water its 1 tspn per gal. i use about 2 tblsp per 2 liter and water the plant with that it stimilates growth. it feeds the micro-organisms in the soil, and it stimulates growth for the plant