And here's a close-up of the rafts. There are 5 rafts, each of which has 10 holes. Seeds are planted in rock-wool in each of these holes. So the system can have 50 plants growing at any given time. For example, lettuce takes about 5 weeks to grow, so this system could produce about 10 heads of lettuce per week. Of course, we're going to plant a variety of things...