Are your annual plants looking a little pale and not as many blossoms as they had?
Its not just the flower its the fertilizer.Fertilize them every time you water. 1 tsp of Nature's Source liquid plant food per gallon of water. It makes beautiful plants. If you have more petunias and than other flowers, use Jack's Classic Petunia FeEd, 1 tbsp per gallon of water. If you have questions about the fertilizer you have, just email or call and I can help.