Soil –
Well drained loamy or black or sandy soil rich in organic matter which is rich in plant nutrients and lime. However, heavy soils are more desirable than light soils.
Climate-
Fennel thrives on long sunny days. A temperature of 15-30° C is the optimum and above 25°C for extended period usually retards development of fennel and in early growth may result premature flowering and very low seed yield.