Or use a potato grow bag. You will have to plant the potatoes a little closer, no more than 4-6 in the bottom of the bag. Plants will emerge around 2-3 weeks after planting. When plants are 1′ tall, hill-up the soil 6-8″ around the plants. It’s ok to cover green leaves! Straw or grass mulch also works well. Don’t water after planting until the plants have emerged. For more information on how to grow potatoes and descriptions of this year’s varieties, click here.