Electrical conductivity (EC) (mS/cm) of Rosa ‘BAIneon' at lower (filled circle) (EC= 3.33-0.46WAP+0.02WAP²P=0.07, R²=0.99; solid line) and higher irrigation (unfilled square) (EC= 1.51-0.07WAP, P=0.03; R²=0.94, dashed line) and Hydrangea macrophylla ‘PIIHM-II' at lower (EC= 1.47-0.08WAP, P=0.03, R²=0.95; solid line) and higher irrigation (EC= 1.09-0.05WAP, P=0.07, R²=0.86; dashed line) at 4, 8, 12, and 18 weeks after potting (WAP). Data points are means averaged over two substrates with differing physical properties, three fertilizer treatments, and four replications (n=24).