The crab apple tree or the tree of love as it was known to the ancient celtsone of our most popular trees the crab apple is the original british apple tree whilst the fruit is rather sour when raw is perfect for making traditional jam and jelly the crab apple blooms white flowers in late spring and the fruit will be ready for picking in autumn crab apple tree supplied is 20 60cm tall depending on season the crab apple tree is native throughout the british isles they can grow to a