Situated in the Chadian Sahel, in the Lake Chad basin, Hadjer Lamis is one of the 23 provinces of Chad. It has surface and underground water potential, and very rich arable land, particularly that resulting from the flooding and ebbing of the waters of the arms of Lake Chad. This land is farmed by market gardeners in Mani canton, some 100 km from N'Djamena, the capital of Chad. The aim of the study is to analyze the production and marketing of market garden produce in the Hadjer lami: the example of Mani township. Using documentary consultations, a questionnaire survey, interviews and direct observations in the villages of Douguia, Mani, Guitté and Miteriné, we arrived at the following results. Production is made possible firstly by the availability and fertility of the land, which can be accessed by inheritance (45%), free grant (32%), lease (10%) and others (13%), then by the availability of underground water, tapped by borehole (42%), water from the Chari (38%), and finally rainwater (20%). Market garden production is carried out by a diverse population, dominated by Arabs (25%), Haoussa (20%), Foulbé (13%) and Foulata (10%). Despite production constraints such as destruction of crops by insects and birds, access to inputs, etc., production is assured and intended not only for feeding the population, but also for the environment.