Figure 1. Mean shoot growth (cm) of ‘Honeycrisp‘ apple trees on B.9, M.9, G.969, CG.4292, G.210, G.87, CG.5257, G.814, G.890 rootstocks measured in 2018 (dark bars) compared to measurements from 2019 (light grey bars). Error bars denote standard error (N=3). Different letters indicate significance differences among means determined using a Tukey‘s mean separation test (α=0.05).