A superbloom is a rare desert botanical phenomenon in California and Arizona in which an unusually high proportion of wildflowers whose seeds have lain dormant in desert soil germinate and blossom at roughly the same time. The phenomenon is associated with an unusually wet rainy season. The term may have developed as a label in the 1990s.[1][2][3]
A similar phenomenon also occurs annually during the wet season along the arid west coast of South Africa between Cape Town and Namaqualand;[4] notably at nature reserves such as the West Coast National Park and Goegap Nature Reserve.[5][6]