On Thu, 29 Mar 2007 23:08:21 +0000 (UTC), FragileWarrior
wrote:

I was thinking of putting a checkerboard herb garden on an area of
"lawn"(right off the edge of our driveway) that is mostly hard-packed
rock/lime and a bit of grass. The blocks I will be using for the
checkerboard are 4" deep so the soil where the herbs will grow will also be
4" deep. Do you think I can get an annual crop of herbs to grow in that?
Or is that just too shallow? I won't be watering them since water costs a
small fortune here.

That should work. Most herbs do not need much soil, little water but
plenty sun. Resist the temptation to fertilize, but if you must, feed
small amounts of diluted fish emulsion.