Frequently asked questions
Answers to the questions our specialists hear most often.
Does trunk injection damage the tree?
Any hole in a trunk is a wound, but when standard diameter and depth are respected and tools are clean, a healthy tree callouses over completely within one or two growing seasons. Trees with extensive trunk decay or a very small diameter are not suitable candidates, and we screen those out at the initial assessment.
How long does a single injection last?
It depends on the compound and the tree species. Nutritional compounds typically cover one growing season, systemic insecticides one to two. The repeat schedule for your specific case is defined and communicated at the initial assessment.
Is trunk injection more expensive than spraying?
A single injection usually costs more than a single spray round, but the correct comparison is per season, not per round. Counting the smaller number of rounds, lower active-ingredient use and the water and labour costs avoided, annual cost comes out lower on many projects — particularly for tall trees.