Sunflowers in a Trough

Yes, that is an old feed trough.  Some friends loaned it to us to use as a brooder for our baby chicks.  It doesn't hold water anymore and they didn't want it back so I had to find a use for it.  I saw a picture of a round trough used as a fish pond in a farmhouse garden.  But again, mine didn't hold water.  What to do?  I decided it could make a good planter in the center of my flower garden.  It's big - 5 ft long.  And it needed to be partially buried in the ground so it wouldn't be so tall.  So here we go boys, start digging!  They looked at me as if I was crazy and shoveled away.  It's handy to have 3 boys around.  Two bags of potting soil and a packet of 18-20 inch sunflowers and there you go.  It could turn out to be super cute and it could be disasterous.  We will have to wait and see.