Even though I have a couple acres I've done most of my gardening in containers because my sunniest areas are my driveway and back porch. One or two speck carcasses are perfect for each tomato, pepper, broccoli, etc. plant in a 3-5 gallon container. I'm about to take some trees out and open up an area and start growing in the ground but the principal is the same. Fish make great fertilizer.