The science that treats the periodic biological phenomena with relation to
climate, especially seasonal changes.
Phenological events are stages of plant growth. From a climatological
viewpoint, these phenomena serve as bases for the interpretation of progress in
local seasons and the climatic zones, and are considered to integrate the
effects of a number of bioclimatic factors on rate of plant development.
Phenology may be considered a branch of the science of bioclimatics, the
sequence of plant or crop development stages through its life cycle. Growth
stages may be defined by stage of physiological development such as
germination, first true leaf, flowering, maturity, etc., and/or by physical
stage such as planting, emergence, harvest, etc.
