Rhododendrons generally bloom for about three to four weeks during their flowering season, which typically occurs from March to June depending on the variety and climate
. Peak bloom often happens in spring, with some varieties flowering earlier in winter or later into summer, allowing for an extended overall blooming period if multiple types are planted
. The exact duration of bloom can vary with weather conditions, temperature, and the specific rhododendron species; blooms in milder climates may last longer, sometimes ranging from two to seven months in total for some varieties
. However, most rhododendrons have a concentrated bloom period of a few weeks, with flowers lasting about two to three weeks once fully open
. Some rhododendrons may also bloom twice in a year under certain conditions, though this is less common
