I planted 3 trees last year in clay... They were avocado trees... they hate clay!! SO I dug these hole that were 4 feet deep and 3 feet wide... It was a mother fu-ker digging this holes... but I got this stuff at the nursery that conditions clay ... helps break it down.. I mixed that stuff with soil and perlite... The trees are doing AWESOME....

although it has only been a year.. they have doubled in size.. all the books I have read say they shuold have died..

anyway, I would did deep.. Take some CREATINE and drink a bunch of coffee, take your shirt off and DIG like a mad man.... crank up the ACDC, BACH and west side connection... you'll have your hole in a day!!!

: )