Plants are budding, but they don't seem to be getting any fatter? Do you have any bottom branches streching out?

How many hours of daylight do your girls get? When were they planted? This is what I think happened. You planted them and they started with less than 12 hours of light. They declared (budded) but the days keep getting longer. Soon your plants were getting more than 12 hours of light each day.

When a plant starts getting long days thet respond with vegeitative growth.

I have good news /bad news for you. Bad news is your plant has to go to October until harvest. Good news? Your plant is a girl. And it will get big if you want it to.