In the spring most people who feed the birds will realize the misery of cleaning the mess from around their feeders as a result of several months worth of shell build-up. In the spring this debris gets quite smelly and ugly.
Garden Friendly®, from Mill Creek® Seed Co., contains only food so there is no waste or debris on the ground and anything that does drop to the ground gets eaten. Additionally, there will be a garden pay off later in the spring since this blend will not germinate; thus no weeds! All other mixes tend to sprout several different plants that many gardeners prefer not to see (nor weed).