‘Callaway’ Crabapple Trees (Malus ‘Callaway’) are popular with many birds due to the large red fruits they produce, making them a great choice for bird watchers. They also offer fragrant white flowers in spring and are highly resistant to scab, fire blight, powdery mildew, and cedar-apple rust. ‘Callaway’ Crabapple Trees can grow up to 25 ft. tall and are hardy in Zones 5 – 8.