What's a good depth to make my outdoor patch?

Hi,
I was just wondering if anybody had any good tips or ideas of how deep I should go,
or rather, what the minimum is to have a good depth. I'm trying to get all my plants
in the ground by Friday. So far I have a patch about 10' x 6' and about 2 and a half
feet deep, and my clones are about 15" tall. The strain is Jack Herer. Any advice would
be greatly appreciated.
Thank You,
Mohammad

two and a half feet sounds more than enough. I think the deeper and the wider a hole is, the better. I planted a handful of seed in a hole where a tree was plucked out and the grow rate was fab.

Go deep young sir, they lie when they say it doesn't matter.

But 2 1/2 ' good job.