Tomato Was A Weed

I was out in my garden early this morning before it got too hot, getting weeds out of my peas when I found a beautiful, six-inch high tomato plant growing among the peas. I didn't plant it there, so it has come up from seeds left in the soil last fall. I wanted to leave it there, but it was shading some of the pea plants, robbing them of sunlight. It was also stealing the nourishment that the peas needed from the soil. My father always said that any plant growing where it wasn't supposed to was a weed. Reluctantly, I pulled it up. The root system seemed relatively undamaged, so I replanted it in the flower garden among the petunias. How long before my wife will notice?