|The Bloom Clock is a research and learning project about flowering plants. The project has both learning and research components. The learning component involves helping people identify plants by means of visual keys, such as colour. The research component is aimed at creating a language for discussing the bloom times of wildflowers and other plants that is neutral with respect to climate, region, and hemisphere. The bloom clock is the largest of a number of observational clock projects and currently comprises about 860 plants and 144 recognition keys. Individual users and classes are welcome to join this project - school classes and both amateur and professional horticulturalists are all welcome.