The purpose of this study is to establish the relationship between Sustainability and TBL Performance in Horticulture Sector in Kenya. The study adopts a descriptive research design. A census of all the 25 registered horticulture firms within Nairobi and its environs was conducted. The majority of horticulture firms in Nairobi and its environs have adopted the TBL dimensions to a large extent. The authors faced the challenge of lack of co-operation from the respondents either by failing to receive back the questionnaires or complete refusal to give the authors audience to present their case. The majority of the horticulture firms are fully aware of the benefits of adopting TBL dimensions and firms that have already embraced the three dimensions, have in mind of the relationship between sustainability and TBL performance.