Preferred common name: Crab apple Other common names: European apple, wild crab The RHS Crab Apple (Malus sylvestris) is one of the ancestors of Malus sylvestris, the domesticated eating apple that is a native, deciduous, small shrubby hedge. The Crab Apple (Malus sylvestris)is very hardy & does well in all positions, in particular sun or partial shade, dry & exposed areas. In early May, the RHS Crab Apple (Malus sylvestris) has flowers that are cupshaped, white with a pink flush emerging from red buds in spring, after they are much sought out by bees. They flower from March to May & leaves are alternate with pointed tips. In autumn, after the frost, yellowgreen tinged with red, fleshy applelike fruits develop that are very sour when raw. Crab Apples have a high pectin content, which makes them ideal for jam making. It is ideal to pick the fruits after frost.