I use worm castings year around.

I believe all Espoma products are organic. They have different kinds for different plants.

I noticed my local lowes, walmarts, and home depot's are all still selling Espoma and a couple of other slow release fertilizers, leaving me also wondering if they're considered safe for summer use. Everything quick release was pulled off the shelves just prior to the start of the rainy season.

Compost. And then there is compost. But micronutrients are not always bad to put out in the heat.