If you wait a season or two, you have to dig to China to get the massive tap root out. It's also poisonous to just about everything except the birds, who enjoy the berries and distribute the plant far and wide. The one in the photograph was on the property when we built our house. I've no idea who it is, but I enjoy the weeping habit and flowers in spring and the deer love the small reddish apples in the fall. There are hundreds of different crabapples available in nurseries all over the country.
Flower colors range from white to purple to pink to deep red.
They can be weeping, spreading, rounded, vase-like and columnar. You have to be careful to choose one that is resistant to fireblight and some of the other diseases to which they can be prone. If I had a place for it, one that I've always wanted is the Sargent Crabapple Malus 'Sargentii' . These are plants who actually form their fruit in fall, but whose fruit stays on into the winter. Some of the ornamental grasses would fall into this category.