The Smart Bag is for the gardener who wants a container that will grow the best possible plant. With its unique design it’s the best method of container gardening. The Smart Bag is a soft-sided, fabric container that has the rigidity to hold its shape and can even support large trees. The Smart Bag is an aeration container. It has a unique ability to air-prune and enhances a plant’s root structure. A highly branched, fibrous root structure is the key to growing a better plant – with more flowers and fruits, and more resistance to insects and diseases. Using reasonable care you can get a couple of years use – or more – out of our Smart Bags. Our 15 Gallon Smart Bag is 18″ wide by 13.5″ tall and holds about 15 gallons of soil, large enough for 3-4 potato plants or 2-3 tomato plants. Our 25 Gallon Smart Bag is 21″ wide by 15.5″ tall, holds about 25 gallons of soil and is large enough for 4-5 potato or 3 tomato plants. Discounts available when you buy 3 bags: $39.99 for 3 Smart Bags 15, and $59.99 for 3 Smart Bags 25.