I have a pond in partial shade. I have EE in a couple inches of water and also outside the pond and directly in the ground as well. Some in ground have failed to come back in spring. I move most of the pots into the garage for the winter and have brought others into the house for winter color.

I put impatiens (and maybe coleus) in with the EE. Works in the pond and in the house later. My only concern with your narrow neck is that multiple plants would probably get stuck in there. Perhaps only one plant would be best. Dividing after a year or two is necessary and gives you a new supply. One year I got several complete round bulbus roots and other times just offshoots of amorphus shape.

I think that depending upon the variety of EE you have will be the determinant whether that pot can be used.
If the bulbs you have are just the ordinary green EE, you won't have enough soil to hold sufficient water or have enough space for the roots.
Unless it's a solid concrete urn (and even then) the leaves will be top heavy and won't take much wind to tip the whole thing over.

Put some ornamental grass with some mounding annual and some ivy/type runners in that urn.
Plant the EEs in the ground.

Thanks so much for the replies. I was expecting Gardenweb to send me an email, so I haven't checked back until now. (I wonder why the email notifications aren't working...)

In the meantime, I went ahead and put the EEs in a large regular pot. I won't know what kind I have until they come up.

I should have said, the urn is the olive oil urn type shape. It really doesn't have much space. I have tried searching for images of what to plant, but they are scarce. Apparently the urns are used as a kind of accent all their own in some gardens.

Dottie, I think I'll try your grass suggestion after drilling a hole.

Thanks again.

Kat

Follow-up: my elephant ears have begun poking out of the soil in the large wide pot I put them in -- some far from where I planted the roots!

My olive-oil urn planter was given drainage holes, and I ended up planting some Solomon's seal for height. They are doing well. For the trailer, I put Virginia creeper -- maybe not the best choice, but I couldn't bear to put an invasive alien with my native Solomon's seal. The Va creeper is probably going to be too long. I may change it.

If you can find yourself a single pot of ducksfoot coleus, snip off the longest piece and root it in water you can then tuck it in the top of that olive oil urn/planter for a bit of color.

Thanks, Dottie! Do you think the big boxes would have that? I've never heard of it.

I found them. Those are beautiful, and there are so many color choices!