Plant phenology informs about the periodic life cycles of plants such as flowering or the timing of leaf - out. (sciencedaily.com)
That's the conclusion of researchers after they painstakingly collected seeds from around New England and grew them in a variety of locations to watch the entire life cycle of the plant. (capeandislands.org)
Four workbooks life cycle of plants, butterflies and frogs and animal kingdom. (tes.com)