Fertilize Appropriately with Balanced Feeding
Tomatoes are heavy feeders, especially of phosphorus and potassium for fruiting, while peppers benefit from a balanced feed with slightly less nitrogen to avoid lush foliage at the expense of fruit. Use an organic fertilizer labeled for vegetables, following package rates.
Side-dress with compost or fish emulsion when fruits set to give your plants a nutrient boost just when they need it most. I always feed mine biweekly during peak production—and the increase in fruit size and flavor is astonishing!