CD garden. Now that spring is finally here, we’ve been planting all sorts of seeds on our window sills. From tomatoes to cucumbers, our family has been watching our plants sprout and grow. When my kids wanted to get in on the action, we set up this easy CD garden using wheatgrass seeds. To their delight, the wheatgrass seeds have sprouted in a matter of days. They now take turns tracking and watering their growing garden every day.