A particularly wet harvest season in 2006 has drawn attention to the topic of pre-harvest sprouting in the mid-Atlantic region. In 2006 the falling number average for east coast wheat was 260 seconds, a 25% decrease from the five year average of 347 seconds. Low falling number scores indicate increased alpha-amylase activity which decreases flour quality. In general, numbers below 300 seconds are considered poor quality. The objectives of this research are to 1) Quantify inherent post-harvest dormancy of current wheat varieties and lines; 2) Evaluate the effect of simulated rainfall intensity and duration and number of wetting/drying cycles on PHS of current wheat varieties and lines; and 3) Evaluate the effects of temperature, moisture, and morphological characteristics, collectively, on pre harvest sprouting of current wheat varieties and lines. Samples will be collected from five locations across the state of Virginia and common lines will be collected from the Wye Research and Extension center in Maryland. This study is designed to identify environmental conditions and spike morphological characteristics that increase sprouting susceptibility. It will utilize aspects from both controlled and field conditions. Regression analysis will identify correlations between morphological and environmental characteristics and pre-harvest sprouting. Correlations between morphological characteristics that decrease water absorption and decreased PHS are expected. Earlier studies have determined a direct correlation between environmental conditions and rate of pre-harvest sprouting, however, the applications of this study are to determine how the environment in the mid-Atlantic region affects PHS and how likely problems with PHS are expected to occur.