You use it to scrape the ground (and the weeds) without disturbing the plant too much.
Is that my problem? Probably. I'm clueless...
Only one of the big 'mater plants made it. The one I was worried about is officially not doing well. I should just throw it out...but I'm softhearted.
But the other has lots of green 'maters. And the cherry tomato plant may need staking soon. It's a variety that's extremely short and stocky, but the guy said it MIGHT need staking if it ended up with lots of 'maters on it, and it's getting a little saggy lately.
You use it to scrape the ground (and the weeds) without disturbing the plant too much.