An arboricultural knowledge course will focus on providing information for those people working on the ground who do not have a background in the subject.
Association director Nick Eden explained: "They enjoy the work and want to progress but don't want to take a year out to study." Courses will run on 16 March, 22 July and 9 November.
A Getting to Grips with Subsidence course will run on 21 April. The association is piloting its third course, Understanding Trees, on 7-9 May.
The back-to-basics training is aimed at those with no formal training but who are interested in trees, such as tree wardens or people who own large gardens or woodland.
For further information, visit www.trees.org.uk.