Crab Apple

Wild ancestor

The crab apple (Malus sylvestris) is the wild ancestor of the thousands of cultivated apple varieties grown worldwide. All domesticated apples derive from a combination of M. sylvestris (European crab) and M. sieversii (Central Asian wild apple), with hybridisation and selection producing increasingly sweet, large-fruited varieties. The wild crab apple’s small, tart, hard fruits are what all apples looked like before 10,000 years of human selection.

Jelly making

Crab apples are unusually high in pectin — the natural gelling agent that makes jam set. This makes them ideal for jelly making, and also makes them a valuable addition to low-pectin fruits (like strawberry or elderberry) that need help setting. Crab apple jelly, made by simmering fruits, straining through muslin, and cooking the clear juice with sugar, produces a beautifully clear, amber-coloured jelly with a distinctive tart-sweet flavour. Herbs (rosemary, sage, mint) are sometimes infused for flavoured variations.

Wildlife value

Crab apples are among the most ecologically valuable fruiting trees in Britain. The small fruits persist through winter and are eaten by fieldfares, waxwings, redwings, blackbirds, and many other birds. Fallen crab apples are eaten by mammals including badgers, foxes, deer, and woodmice. The flowers are among the best sources of early pollen for bees.

Ornamental crabs

Many ornamental Malus varieties planted in streets and gardens produce attractive crab apples in autumn — coloured red, orange, yellow, or bi-coloured. Most are edible and some make excellent jelly. The fruits are often left on the tree through winter for their ornamental and wildlife value.