A bulb assembly connected with a decorative flower includes a bulb, a bulb holder, a cylindrical sleeve made of an elastic material, and a decorative flower having soft petals. The sleeve is inserted within the lower base of the flower to form a single structure. The sleeve also is sleeved onto tho bulb holder to form the elastic connection with the bulb holder. When a bulb assembly is broken, it can be replaced with a new one, while the use of the decorative flower with soft petals can be continued.