Youth learn to make the most of their garden space using different planting methods, then how to harvest, store, preserve, and/or sell their bounty of vegetables and herbs. They study plant genetics, plant diversity, and plants in space. Level D further explores integrated pest management and summarizes horticulture-related careers. Youth “learn by doing” in 18 fun activities that include using garden-planning software and apps, investigating the effects of pollution, growing hydroponic plants, and conducting a cultivar trial.