How can I prop up an artificial tree so it stands up in a crock?

How tall is the tree? How big is the crock? Are you planning to use the crock again?

Put rocks and then smaller stones in it. I’ve done it with a real tree too. Works good. I had everything in my back yard so it was easy!

Have someone hold it straight and fill with pea gravel. One bag should do it for under $4 at Home Depot. Just rinse before you use they usually have a little bit of dirt on them.

If your crock is big and you can fit a tree stand inside the crock then I would use a tree stand.

Are you saying the tree stand is permanent and it won't fit in the crock? Looks like you either need to take the stand off or get a bigger crock. The idea sounds good. Good luck.