My cherry tomatoes are doing a-ok. But my beefsteak tomatos are not looking too healthy. They have lots of yellow/dead leaves on the bottom and while they're growing taller, they aren't very full. They are starting to bloom, but they are not producing any fruit yet. I clipped off the dead leaves, but the plants look so bare. Is there anything natural I can use to feed them? My MIL suggested Miracle Grow, but that can't be a good idea on a plant from which we plan to eat! Help with my tomatoes!