This section is from the book "Save It For Winter.", by Frederick Fry Rockwell. Also available from Amazon: Save It For Winter; Modern Methods Of Canning, Dehydrating, Preserving And Storing Vegetables And Fruit For Winter Use, With Comments On The Best ... For Saving, And When And How To Grow Them.
If there is enough celery to keep for use well into the winter, it should be handled in three lots. (1) That wanted for early use may be banked up with earth out of doors and covered up with leaves later and used as wanted directly from the garden. (2) The celery wanted for late fall should be stored in a trench outside. Make this in a well-drained place about a foot wide and deep enough to hold the stalks up to the tops of the leaves. Take up the plants with the roots on, and what soil adheres to them. The tops and stalks should be dry when stored away, when there is danger of severe freezing weather, cover the trench up with hay, a few inches at first, and adding more as the weather gets colder. Celery may be kept in a trench of this kind usually until after Christmas. (3) The remainder of the crop should be stored in a cool cellar. The most convenient way of handling it is to get some boxes, about as deep as the celery is tall, in which the celery may be packed away after a couple of inches of light soil or sand is placed in the bottom of the boxes. The plants are packed in the box upright, quite tightly, with the roots on the moist soil at the bottom; if the soil seems to dry out, give it a little water occasionally, being careful not to get it on the leaves or stalks. In this way the celery is kept fresh and crisp and will continue growth and blanch thoroughly after being put into the cellar.