Often the best tie is the simplest tie - and this is why we stock traditional raffia and jute twine. Both versatile and cheap, raffia and twine are gentle on plant stems and will rot away after a few years - so plants won't become 'strangled' as they outgrow their ties.
More permanent plant ties are those made from plastic. It's important when selecting a plastic tie to choose one that is large enough to allow the plant stem to grow unhindered - traditional 'figure of eight' ties are ideal for plants with soft stems - such as tomatoes - as they do not damage the stem by rubbing against it. Plastic plant ties are often reusable - so you can use the same set of ties year after year to provide strong, secure ties for your plants.