A specialist tree care service is a company that attends to the health and well-being of trees from a technical standpoint. Specialists assess whether or not a tree may need pruning, shaping, transplanting, planting, etc. They will also look at any specific requirements for feeding and watering trees if applicable. In addition, they will provide maintenance programs to ensure the tree continues in good health after attending to it initially.
Specialist tree care companies tend not to be general garden maintenance companies that do some tree work on a part-time basis. Specialist tree care companies attend many arboricultural courses throughout their career and have a vast knowledge about various species of trees.
In addition, they have access to specialist equipment such as bucket trucks, aerial rescue equipment, ladders, etc., which allows them to reach into high branches and climb trees.