Phytotoxicity and leaf burn are synonymous for the unsightly leaf tissue desiccation that is commonly associated with foliar applications of pesticides, plant growth regulators, and fertilizers. Phytotoxicity can occur when the solute concentration in contact with the foliage has a greater osmotic potential than the adjacent plant cells, in which case water will leave those cells by osmosis and result in desiccated tissue because of the lost turgidity. The objectives of this study were to identify the principal components responsible for phytotoxic damage and from this develop a predictive model, as well as determine the efficacy of a follow up foliar iron application in ameliorating phytotoxicity. The experimental design was a randomized complete block design on Penn A-4 and G-2 creeping bentgrass. There were seven independent spray events in the summer of 2006 in which three nitrogen fertilizer forms that included ammonium nitrate ((NH₄)NO₃), ammonium sulfate ((NH₄)₂SO₄), and urea ((NH₂)₂CO) were applied. These nitrogen fertilizers were applied at three rates (9.8, 19.5, and 29.3 kg N ha^-1) and two carrier volumes (407.5 or 815 L ha^-1). Digital images were collected 1.5, 24, and 96 hours following the spray event. Color readings using a Fieldscout TCM 500 turf color meter were collected 1.5 hours following the spray event. 4 hours following the spray event iron was applied as a ferrous chloride source (FeCl₂·2H₂O) at a rate of 1.2 kg Fe ha^-1 to one half of each experimental unit. Clippings were collected 168 hours following the spray event and analyzed for leaf nitrogen content. Multivariate regression analysis identified numerous influential environmental parameters that included soil moisture, humidity, and soil and air temperature. The follow-up foliar iron applications increased dark green color regardless of the nitrogen treatment. Urea treatments resulted in less nitrogen recovery one week following the initial spray event.