Malus Robusta 9x9 Red SentinelOrnamental Crabapple Red Sentinel A particularly attractive and prolific crabapple, Malus x robusta Red Sentinel is a vigorous, small deciduous tree, an ideal specimen tree and a star of the winter garden. The tree has an attractive, upright habit and spreading, well branched head, and the green leaves develop red tints in autumn. Masses of large, pink tinged white flowers, 3cm across, in April and May are followed by heavy crops of yellow and red