Nic - we use reusable plastic staking ties you can find in BigW and bunnings. initially we talked about using stockings, but given i don't wear them, there are none to recycle like that! we looked around for options that would be best given we have a couple of hundred roses as well as the vegies, and found these to be the best option. they do up kinda like electrical ties but they don't lock at one point so you can adjust and move them as the plant grows. the come in a couple of types - one is like a green chain and you just feed one end through a loop and twist so it locks in place, the other type is more like the electrical ties but easily undone. we managed to get them cheap (i think maybe $2 for about 20 of them) - have been able to reuse them heaps though. they're strong enough to hold up climbing roses, but haven't done any damage to the tomato plants at all!

if you need more info (that's a really woeful description) let me know - i know where to drag a packet of them out so might be able to get more info!