We added 18 inches of topsoil and drip lines under the pv array. We basically neglected this area all summer but the shade allowed the vegies to thrive during the hot summer. A positive note on the pv system... Our actual payback on the system slowed during the recession as we were not able to maimize our tax deductions and take all the allowable depreciation. Recently though, we noticed we still had a significant suplus in electrical production so we converted the house water heater from propane to electricity. Our annual propane bill will probably drop from $1300 to $400! We'll know soon enough but this savings will shorten the payback period on our initial investment. Stay tuned; Ed