When Pauline Walker from Michigan used empty seed packets to mark her garden rows, she found that they disintegrated quickly, especially when the packet sat on the moist soil. Her solution? Clip the empty packet into plastic cardholders. The ones that hold the small greeting card in a floral arrangement from her local florist work great. The empty packet is out of the soil and will last long enough for Pauline to identify the seedlings as they sprout.