Quoting Rick: "In the yard where I grew up, the ONLY place that the grass was green was right over the drain line. Green and lush there, brown all summer elsewhere. I always thought that would be a great place to put a garden! Deeply irrigated PLUS deep-fed with organic fertilizer."
We had an area like that when we lived in deepest darkest Eastern Oregon, too. Our goats thought it was great and so did the bunnies. Um, but we seemed to end up with more dead and deformed babies than one would think normal. Soooo, I personally would be hesitant to plant veggies in that sort of spot.