We went to northern Michigan 2 weeks ago to visit relatives they grow celery and head lettuce from grocery store cuttings. When we returned home I could hardly wait to try this. I cut the end of a celery off put it in water and a week later the picture shows what I have. This cutting is almost 2" long but it works with a smaller cutting only 1" long. It is starting to grow roots and a new top. You can grow these in flower pots or the garden too. You can also cut the tops from celery and root them in water in about 2 weeks you have a plant with leaves ready to put in pots or the garden. Cut the bottom and top off of a 2 liter soft drink bottom, set the cone over your celery plants it makes the stalks grow tall and straight. You can grow 3 stalks of celery inside a 2 liter cone, 1 stalk inside a 16 oz or 20 oz soft drink cone. You can grow 5 celery plants in a 10" pot with a home made cone. I was told celery does good in cold weather, snow, ice, but if it gets below about 25 degrees at night bring the plants into the house at night.
I am learning as I go, has anyone done this before?
This works with head lettuce too.
I would love to have 30 stalks of celery growing in the garden this winter and 20 heads of lettuce too.
I bought 2 more stalks of celery at the grocery store, I made sure they had a lot of leaves on top to sprout. 2 more cuttings from the bottom make 3 in the rain pan outside. 13 cuttings in one glass, 11 cuttings in another glass, 6 cutting outside in the water pan. If they all grow roots we will have 33 celery plants plus 1 cutting from a head of lettuce.
-- how much of the top do you cut off? Just above the shoulder?
But this looks like a fun project. I'll be watching your progress. 
