Supporting Tomatoes Bush types require no supports. The main stem of cordon types needs supporting to stop it falling over. Canes or strings can be used.
tie tomato stem each 30 cm
If canes are used to support the tomato plants, the main stem should be tied loosely to the cane as it grows. So there will be a string holding the stem to the cane every 30cm or so. Soft string should be used, so that it does not cut into the stem.