Growing degree-day facts for kids
Growing degree days (GDD), also called growing degree units (GDUs), are a heuristic tool in phenology.
GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates such as the date that a flower will bloom, an insect will emerge from dormancy, or a crop will reach maturity.
See also
In Spanish: Suma térmica para niños
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Growing degree-day Facts for Kids. Kiddle Encyclopedia.