"Not scoring in the second half was frustrating as we had most of the possession and territory. We just made a few mistakes and the boys lost a bit of composure there for a bit and that was the story really.
"We played all the rugby but unfortunately we just couldn't convert it into points."
Bay of Plenty were awarded the Sportsmanship Trophy after the final and had four players named in the tournament team in lock Stanley Tupou-Fosita, flanker Walter Ngarere, second-five Dawson Smith and openside flanker Sloan Lankshear.
Bay of Plenty went through pool play undefeated with wins over Thames Valley 70-3, Counties Manukau 24-5, Waikato 36-12, Northland 16-15 and Auckland West 31-7.
"We had a good pre-season and we had a really tough pool in the fact we had Counties, Waikato and Northland, all very strong teams," Harvey said.
"We were unbeaten against them and had a really successful campaign but unfortunately we stumbled at the last hurdle which is disappointing."
The Roller Mills tournament has been running annually since 1925 for players under 13 years of age and 57 kilograms. Teams from Northland, North Harbour, Auckland, Bay of Plenty, Waikato, King Country, Counties Manukau and Taranaki competed at this year's event.