I realize it may not be the best choice but is there any harm in using this product for fruits or vegetables?

For planting, The Tree and Shrub is perfect, the fractional pieces of organics provides a perfect media for a planting mix, follow the label instructions. When planting vegetables the Sta-Green Flower and Vegetable Garden Soil is the ideal product because it contains more "fines" and better for rapid root development that takes place with annual crops. If you are conditioning the soil before planting, either will work well.

Yes, this can be used on the soil for gardens. It is made of natural ingredients.