According to EB. use 3C dry organic fertilizer, but the bag of Dr. Earth Tomato Vegetable & Herb says 1/2C per 1/2 cu ft or 5 gallons of potting soil. So that would be 1 1/2 C by gallons of soil (doesn't say mix). That's for tomatoes. For other things like beans, cucumbers it would come to 3/4 cup @1/4C per 1/2 cu ft or 5 gallons. It's 4-6-3, much better than 8-3-5 of Earthbox natural fertilizer, but idk how much to use. I'm inclined to go with 3C because it's in a strip and in mix not soil. But I don't want to burn the plants. I have a call into Planet Natural with the same question. Any experience is appreciated.