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            4
              The "Phenology" Extension
    The Phenology extension is an extension
      to the WeeWX software suite by
      Tom Keffer, Matthew Wall, and Gary Roderick.  This extension module calculates
      and charts cumulative Growing Degree-Days, according to various
      published models. 
             Flowering Almond Tree Branch in a Glass 
      (1888, van Gogh ) 
            
              The Phenology Models
              
 The Phenology WeeWX Extension includes over 200 development
      models for over 125 species of crops and pests.
 
 
 
            
              The Phenology Image Generator
              
 This extension provides its own Phenology Image Generator, which
      is a drop-in a replacement for the WeeWX Image
      Generator.
 
 
 
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