Someone in the one of the other (regular plants?)swap forums had walking onions recently... Sorry I can't remember any more than that but maybe you can research it a little bit more... Good luck!

I have one row of Egyptian onions in my garden. The row has been there for 5 years. I don't want them walking, so I take all the bulb-lets off in the fall and store them in my basement. Two week ago I potted the clusters up into 5 inch pots, covering with 2 inches of pro-mix. The bulb-lets had already started to sprout about 1/2 inch. They are outside now in zone 5. They will be about 6 inches tall when I take them to the Farmer's Market May 1st. Many of them have 6-8 bulb on each. I don't separate them. Wish I knew how to post a picture. Please don't try to explain how, I'll never get it.

Finally, just found and ordered 40 heritage white from Egyptianonions.com, after eating the white multipliers and few of Kelly's potato onions all spring, I have narrowed my selections down to three varieties of perennial onions: heritage sweet white EWO, Kelly's potato onions and a white multiplier. The white multipliers and the heritage EWO are from the Deep South and suit my taste buds, and should provide green onions year round. Kelly's Green mountains will give me storage onions year round, therefore perennial onions that suit my taste buds and no more buying onions from the grocery store. Pretty excited about my plan, Heritage Whites and White Multipliers from Florida for year round green onions and Kelly's potato onions for storage, all well suited to my climate and taste buds. These are Kelly's potato onions from last week. Now putting up seed heads that I will start from seed next year. Hopefully I will wind up with a landrace well suited to my climate.

I have a large amount of Egyptian walking (tree) onions to trade for potato onions ("multiplier" onions). Any amount, hopefully large. Now would be a great time to be planting either. Egyptian onions are not a sweet onion and can be rather hot and they don't get huge but they multiply like crazy. First of all, the parent plant muliplies into a large clump of onions. Secondly, they produce clusters of babies at the top of the stalk and these babies make their own leaves and those babies even make their own babies. All these babies can be replanted. They are hardy even in Canada. I planted my very small bulbs last November 1 and they were sprouting leaves in 3 days. They survived our very frigid winter and made a huge amount of babies in spring 2010. You'll have onions and green onions year round no matter where you live. The grasshoppers ate them all to the ground this summer but keep on putting out new leaves. Here is a link that might be useful: