On Fri, 29 Jul 2011 14:05:38 -0400, "Daniel B. Martin"
wrote:

On 07/29/2011 11:13 AM, wrote:
... you may have drowned it ...

Not likely. I use 5-gal paint pails drilled with five
3/4" drain holes and a layer of gravel in the bottom.

In that case the Spotlight Of Suspicion falls on a plant disease. A
blight can kill quickly. {From one who knows.}

I don't know much of anything about pests and pestilences. The first
year I did a container garden (2008) I learned more than I ever wanted
to know about cabbage worms and thereafter simply removed their
favorite foods from the buffet. Other than that, I haven't had any
problems.