From Bear:

Mine is in full sun, in order to get it to dry out since we get a lot of rain, You don't want it real close to the house, since it may smell when you turn it or go digging for gold. You don't want it at the farthest corner of the place as that will make for long trips to and from when adding to it. If you have a spot that you may want to plant later that would be a good spot, since it will add nutiants to the ground around it, and you can start a new one in the next spot you want to plant in.