Combine heirloom eating quality and hybrid disease resistance! The practice of grafting vegetables onto root stock of highly disease resistant varieties has become increasingly popular in recent years, especially in high tunnel production. By grafting your favorite varieties onto disease tolerant rootstock, you can get the flavor you love while achieving improved disease protection and hardiness. Grafting has been shown to improve crop health, yield, and disease resistance. These flexible silicone grafting clips are 1.5 mm in diameter and are approximately 1/2" long. Simply place the clip over the graft, and it hold the joined stems in place. As the plant grows, the clip simply falls off.