2nd brood chambers on the Nucs, probably a bit early

most have 7-9 frames of bees and 4 frames of brood so there ready for 2nd brood chambers. Sweet clover and alfalfa are just starting to bloom.
generally when there's 8 or more frames of bees I add another box either a 2nd brood chamber for the queen to lay eggs in or a honey super.
June, 10th 2023