when should you see roots on cuttings
4. Cover the roots back up again and water the plant in. For Perennial Plants. 1. For plants with smaller roots, like perennials, take 2 to 3 inch (5 to 7.5 cm) cuttings the same way as above with a flat cut on top and a slanted cut on the bottom to help you remember the root's correct orientation. 2.. For plants with smaller roots, like perennials, take 2 to 3 inch (5 to 7.5 cm) cuttings the same way as above with a flat cut on top and a slanted cut on the bottom to help you remember the root's correct orientation. 2.