Next week I will be removing an unsightly, tired looking cedar hedge from a 10' x 4' bed which is located adjacent to my back patio. The hedge is approximately 6' tall. There are no other plants in this bed. I will be replacing the hedge with a 6' tall lattice and two artic beauty male kiwi vines. Will also be adding good quality soil. As you can imagine, it will be quite a task! I am quite new to gardening and I was wondering if anyone had some suggestions on what, if any, should I add to amend the soil. Last year I added a good quality top soil throughout my garden, including this particular bed. Also, if it's too difficult to remove all of the roots from the hedge, how long will it take them to decompose and will they inhibit the growth of the kiwi vine. Thanks for your help.