Just bought a fresh bunch of celery...will try it and see how it does.

replant the stems of green onions or stem end of cooking onions.
You get more green onions.
I keep a porch planter box full, snip the greens when I want garnish.
Leave them long enough and they go to seed.

Also carrot tops, if you want seed.

And I have to say, I *LOVE* your sig line.

It is too true!

I got a lot of green tops, but then they started getting sort of 'wilty'. I'm thinking maybe it's time to transplant them from the planter out into the garden.

They grow into "real" onions either from seeds or from little bulbs which you have to buy.
The ones I grow from the end of an onion just produce greens, which is fine for me, cause I use a lot of onion greens.
I don't think the cuttings have enough nourishment to make a new bulb.
Again, that is just off the top of head.
Before coffee even....

Cut off the outer layers to use in cooking, then let the cores attached to the roots to plant. Figured those were close enough to the little bulbs to give it a shot. Find out soon enough when I dig em up to transplant.

out in the garden.

set up in our basement. We've been growing our own lettuce, spinach, swiss chard and arugula all winter. Enough to keep a family of 4 supplied w/ greens daily.