The ‘Voluntary agreement on the CO2 emissions space for the CO2 sectoral system for greenhouse horticulture in 2013-2020’ includes provisions for its evaluation as well as for the CO2 sectoral system for greenhouse horticulture itself. That system has been evaluated by the Dutch Ministries of Economic Affairs, Infrastructure & Environment and Finance and by the greenhouse horticulture sector. CE Delft was commissioned by the Ministry of Economic Affairs to conduct an external review of this draft evaluation. The conclusions of that review are presented in this report.