This year I planted four plants upside down using a windsock, it has worked beautifully for all the plants they look really good. the only problem is 1 of the plants is producing fruit, and the other three are not. two get direct sunlight and the cherry version of the two is producing. The other lareger tomato plants are not producing or putting out flowers. 1 is in direct sunlight with the cherry tomato plant, the other two are in a medium sunlight area and are very green and healthy, but nothing else. Any suggestions would be helpful.