Last year my tomatoes got pretty tall, and then during a storm they fell over. Didn't kill them, but didn't do them any good, either. How do you keep yours upright? (also posted in tomato forum)
I would suggest what we did up in Yreka and Weed, where the wind whistles down the valley...put the containers up within 'railings' of tightly-strung thin rope and clip the pot or cage to both ropes. Presto, pots stay up. Without a cage, though, I don't guarantee the plants will!
Hope that helps!
I tie my cages to a steel stake or to the chain link fence in the back yard. When they top out at fence-top ht, I tie the vines along the top of the fence.
These are still young plants.
I saw this product - Never Tip Pot Holders - at a local nursery where they were used to keep large ornamentals from tipping. (see link) I haven't used them myself, but I was there on a very blustery day and they sure did the trick.
Here is a link that might be useful: Never Tip Pot Holders