Earlier this year, seven diseased heritage trees were removed from the avenue planted by early settlers near the Wanaka Station Park homestead.
No trees are being removed during the present operation.
The health of the avenue was reviewed last year as part of a district-wide identification of hazardous trees, after the death of Queenstown man Russell Liggett (57) when a tree fell on his vehicle on Lower Shotover St in September 2009.
Otago Polytechnic arboriculture students from Dunedin are helping Queenstown Lakes District Council contractor Asplundh cut dead limbs from the trees.
Tutor Jerry Lynch, of Dunedin, said 13 of the 15 students taking the year-long national certificate of arboriculture course were in Wanaka for a week of practical experience. There was a national shortage of arborists and graduates were "incredibly sought-after."
"There's one company in Christchurch that could take all of our graduates ... It's a recession-proof industry. Trees always need maintenance, people are planting more, and there's power lines to keep clear, too," Mr Lynch said.
