A few weeks ago I planted my last little tomato plant and I assumed it wouldn’t grow because it was in a really shady corner so I didn’t bother putting in a support structure. I went away for a few weeks and have come back to a massive plant with loads of green tomatoes on it! Trouble is, it's sprawled all over the ground and is smothering my nice new ceanothus bush! So, my question is - is it too late to put in some sort of support now? The stems are really thick and heavy (and a bit tangled) - will they just snap if I try and tie them up?