We studied greenhouse (GHG) gas fluxes at an agricultural peat soil site with willow, forage and set-aside. The mean annual water table rose from 80 to 30 cm in 2019–2022. Raising the water table slowed down annual CO₂ emissions. CH₄ fluxes changed from uptake to emissions, and nitrous oxide emissions decreased towards the end of the experiment. The total greenhouse gas balance was relatively high, highlighting the challenge in mitigating emissions from cultivated peatlands.