Root zone volumetric water content (VWC) analysis for each substrate for Experiment One, 15 Nov 2014 - 15 Jan 2015. SCS = surfactant-coated perennial ryegrass (Lolium perenne L.) seed; CHK = uncoated seed. WSAND (100% hydrophilic or wettable sand); WSP (hydrophilic 90:10% v/v sand:peat); HSS (100% hydrophobic or non-wettable stearic acid-treated sand); and HSP (hydrophobic 90:10% v/v sand:peat). Imposed dry-down occurred on 4, 7, 9, and 12 Jan 2015. VWC means (n=4) with the “ * ” symbol indicates statistical significance according to Tukey's honestly significant difference test at p ≤ 0.05; no symbol indicates not significantly different.