Arborvitaes Split ?

To prevent damage from winter snow loads and wind, or to repair it, you can use twine hidden inside the foliage to pull your arborvitae tops together. You can leave the supporting twine in permanently, although you might want to adjust or replace it in a couple of years. I use a special flat nylon strapping called "Arbortape", beacause of it's strength and durability, but for the average homeowner twine is sufficient. Don't be afraid to repair larger arborvitae. Even if they are 10' or 20' high they can often be repaired by using rope and/or cutting the top a bit to lighten the damaged leader. Just be careful or contact your arborist.