How long will a bloom stay on an uncut sunflower?

A bloom on an uncut sunflower typically lasts for about 5 to 10 days, depending on environmental conditions such as temperature and humidity. After blooming, the petals will gradually wilt and fall off. If left uncut, the sunflower will continue to produce seeds after the bloom fades. The overall health of the plant and care it receives can also impact the duration of the bloom.