Two existing trees are being carved to flank each side of a refurbished memorial at the Gate Pa Historic Reserve.
The original memorial was built for the battle's centenary commemorations in 1964 and work was being carried out to enlarge the memorial and add other details to the historic reserve.
Pukehinahina Charitable Trust project director Buddy Mikaere said the tops of two trees on either side of the memorial were chopped and carvers were shaping the remainder of the trees on site.
Mr Mikaere said the carvings were already underway and were expected to be completed by the middle of next week.
The memorial's deck, known as a marae atea in Maori, would measure about 100sq m and was expected to be completed by the end of next week, Tauranga City Council project manager of city projects Allan Sizemore said.