Garden Dictionary Word: bioclimatic law (syn. Hopkins' law)
bioclimatic law (syn. Hopkins' law)
The generalization that in temperate North America, weather-related events, such as bloom time, can be determined to be similar as you move up or down a mountain 400 feet, or one degree of latitude, or 5 degrees of longitude. In the spring, each of these measurements are eastward or upward and are four days later; in autumn, they are westward or downward and are four days earlier.
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