Plant food or fertilizers specifically designed for tomatoes will not have a sufficient level of nitrogen needed for proper growth by most other plants, especially ornamental plants such as flowers. Use a high-nitrogen basic fertilizer for hanging baskets, unless you've planted tomatoes in the baskets.
About this Author
Bobbi Keffer attended Kent State University, studying education but soon found her true love to be in the garden. She prides herself on her frugal skills, re-using, recycling, and re-inventing her whimsical style in her home and garden.