The best time to cut the vines on trees is while they are dormant (January-March). They don't all have skin irritants but it's safest to wear gloves when cutting back vines.
For more information contact the Master Gardener Volunteers or Nassau County extension director Dr. Taylor Clem. They will answer questions on any plant issue.
The UF/IFAS extension Nassau County extension office is open from Monday to Friday 8am to 5pm
Questions for the Nassau County Master Gardeners can be emailed to NassauMGV@ifas.ufl.edu.