Divide it into quarters like a pizza. Now you have 4 agapanthus plants. I wish you can send me one. I love them. The clumps need to be divided every few years otherwise the middle never gets enough water/food/oxygen.

or if you like the big clump give it a good feed and plenty of water in the next month or so and then if it doesn't flower try splitting it as Bathgate suggests.

One of our council gardens has a brilliant clump about 6ft wide that flowers every year, but the do feed it.

good morning, ladies, i will divide it as only have a small garden, i wil send you some bathgate, when i have done it i will contact you.xx by the way ladies how do i feed it.

i use a slow release pellet or sometimes spare diluted tomato food.

Unless you have a phytosanitary certificate it us unlikely to get through customs in the USA.

Thank you so much for your generous offer Patricia, but I live in the United States and we aren't allowed to send live plants internationally. Maybe somebody else would appreciate a division. Thanks anyway.