Hi - I have planted six ivy plants around the retaining walls around my garden. The walls are not near the house, are in excellent condition and are about 20metres long by 4 metres high - ugly and bare concrete which I cannot wait to cover up! The selection of ivy i have got here are self clinging types. Should I put up some wire and attach the ivy to the wall to start it off or if i leave it will it find the wall and attach itself? Im not sure how to get it established and would appreciate your advice please. Thanks.