Blenheim Orange is a multi-purpose (eater and cooker) apple variety that can be slow coming into cropping. However if grown on rootstock M26 and well pollinated, and little pruned in the early years, I have found it to be doing well. It is a triploid variety and therefore two other diploid apple varieties should be planted at the same time. Pick it around late September/ early October time.
It is a large apple and it does keep well over the winter months. It is a very successful multi-purpose apple; you can bake it, freeze it, cook it and eat it. It is an old variety, and it was already known in the late 1700s. As a variety it was stocked by various nursery men, and mentioned in their lists of varieties available around 1825.