Plantinellen, it sounds to me like you've pretty much already got the gist of it. Rich soil, lots of water, but well-drained for the celeriac for sure, perhaps not as critical for the cutting celery. I planted both last year, and both of these seem to have survived the winter outdoors -- the crowsn look good now that the snow has melted. The regular celery is just rotted mush now by contrast. I'm sure that the cutting celery will regrow at least some useful leaves before making seed heads. Perhaps the seeds could be gathered for celery seed as well as for seed-saving. Your crawl space sounds like an ideal place to store root vegetables (hope there are no mice or voles, though).

Zackey- if you take your celery out of the plastic bag, and trim the ends (don't wash) , wrap tightly in aluminum foil, it literally lasts for weeks to over a month this way in the fridge. I don't know why- something to do with the foil. My celery when kept in the plastic bag always went to mush. Wrapped in foil it's never gone bad, but it's gone 'blah'. Hope that helps. If you freeze it, post back how it goes. I only use it for soups as well.

A potato, if not rotten, is a live thing. If it is exposed to light, it begins to develop chlorophyll and this is the 'green' that you see. Eat too much chlorophill and green potoato skin, and you'll get an upset stomach, or stomach ache. If you want to grow a few potato plants, it is very easy to do. One large potato can spawn several plants. Reproduction is by cuttings, so new plants will breed true to its parent. Locate the 'eyes' on a potato. These are the sites of new plants. Cut the potato in pieces leaving as large amount of potato as possible around and under the eyes. Plant these pieces in soil with the eye part facing up. The eye should not be very deep and will sprout ok if it is showing. Gardeners of my time covered the eye with a thin layer of fine dirt to discourage birds from picking at the planting. Plant in full sun and keep the soil moist, but not saturated. The eye should sprout in a few days and not long after that you will have a new plant. The young plant consumes much of the atarch in the piece of the potato while developing its own roots. That is why the potato piece should not be too small. You can have fun with a sweet potato. It will sprout and make a considerable amount of vines before it runs out of food. Place a whole sweet potato in a small ceramic pot and hang where it will receive light. Submerge half to 2/3 of the potato with water. Keep watered as the plant grows. It will grow a mass of vines that spill over the pot and hang down. Its growth will contine until it runs the parent potato out of food. I have known of folks that kept such a vine alive the entire growing season. I don't know their technique, but I think that after the plant became established, they added soil and fed the plant.

Oh I forgot about cukes! They are very nice, chopped, in all kinds of salads. When I did eat tuna, I would add the chopped apples, along w/ onion, lemon or lime juice & mayo - and celery too - sometimes bell peppers. Nowadays I too have switched to salmon instead of tuna. I make salad w/ chopped parsley, green onion & leaf celery, dijon, mayo and eat it w/ celery sticks. I like to add a few drops of smoke flavoring too.