First timer here!
My iced grapefruit are just over 4 weeks into flowering.
1st of all - do they look like they are making good progress for the time?
2nd will they get more dense over the next few weeks
3rd how long left??
They are looking amazing for your first grow, They will add on most weight in the last few weeks of flowering which is why it is important not to cut early. I would say you still have 4 weeks left.