An heirloom purple flour corn. While supplies last. 50 heirloom, chemical-free seeds per pack. Free shipping on orders over $34. HOW TO GROW: Plant seeds 1 inch deep after all danger of frost has passed. For best pollination, plant corn in a block of at least ten plants by ten plants (larger if possible). Harvest when the corn is tender and the silk has just dried. Annual. Free shipping on orders over $34.