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This work was supported by a Primary Growth Partnership (Ministry of Primary Industries, New Zealand) awarded to Mānuka Research Partnership (NZ) Limited, and a scholarship from Callaghan Innovation (NZ) to L.M.N. [Contract: MARP1001].

We would like to acknowledge the staff at the Plant Growth Unit at Massey University; Palmerston North, New Zealand for support with the glasshouse experimental setup. Chris Rawlingson, Institute of Agriculture & Environment, Massey University; Palmerston North, New Zealand for assistance with HPLC instrumentation and supporting staff from Massey University; Palmerston North, New Zealand, who assisted with nectar collection and plant growth data measurements.

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