Spring nitrogen (N) and sulfur (S) applications to wheat in Virginia are imperative for high yielding systems. Traditionally, Virginia farmers should apply N to wheat in 3 or 4 splits across the growing season to ensure optimal fertility and reduce chances for N loss. These applications occur in the fall to initiate tillering and again at Zadok's growth stage (GS) 25 and 30 in the Spring. The conclusion is that overall, we may see plant injury if Spring fertilizer is applied past Zadoks' GS30.