Answer: Congratulations on your green thumb! If you've already harvested your celery by cutting it from the roots, store at 34F degrees at 98-100 percent humidity and it will keep for 14-28 days. For future reference, late celery may be
stored in the garden for 1 to 2 months by building up soil
at the base of the plant. Gradually build up the bank of
soil to the top of the plant. This should be done before
winter sets in. As the weather gets colder, cover the
plants with straw held down by boards.
Or, celery may be dug out of the garden, with the roots
still attached, and placed in the basement or root cellar
before freezing temperatures occur. Set the plants on the
floor and pack them together tightly. If kept moderately
moist, the plants will keep 1 to 2 months.
A third method of storage would be to place the plants in
a trench. The trench should be 10 to 12 inches wide and 24
inches deep. Again, dig out the plants leaving the soil
attached, pack the celery closely into the trench, and then
water. Allow the plant tops to dry off. Make a sloping roof
for the trench and cover it with straw adding more straw as
the weather gets colder. Celery will keep in this storage
until late winter.
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