You could also set up a few strong posts, the two ends with supporting stakes at a 45 degree angle and two tightened wires. The posts would need to be set at about 5 metres apart along the length of the row. Heavy wire, about 8 gauge, would need to be used and tightened off with fencing turnbuckles.
This support would be essentially a two-strand wire fence. The lower stand could be placed at about 50cm and the higher one at 1.2 metres.