An experiment on effect of plant geometry and weed management on yield and quality parameters of fennel was carried out at Agronomy Farm, Jobner, Jaipur, Rajasthan during the winter (rabi) seasons of 2016–17 and 2017–18. The experiment was laid out in split plot design with 3 replications, consisting of 24 treatments, namely, 4 plant geometries (50 x 20 cm, 50 x 25 cm, 60 x 15 cm and 60 x 20 cm) in main plot and 6 weed management measures (weedy check, two HW at 25 and 50 DAS, pendimethalin @ 0.75 kg/ha (PE), oxadiargyl @ 75 g/ha (PE), pendimethalin @ 0.75 kg/ha (PE) + one HW at 30 DAS and oxadiargyl @ 75 g/ha (PE) + one HW at 30 DAS) in sub plots. Pooled results showed that treatment with plant geometry 60 x 20 cm recorded significantly maximum seed, straw and biological yields and quality parameters viz. chlorophyll content at 75 DAS (1.87 mg/g), protein content (9.21%), oil content (1.541%) and oil yield (34.42 kg/ha) of fennel. Between weed management practices, HW twice at 25 and 50 DAS significantly improved the yield of crop and quality parameters viz; chlorophyll content at 75 DAS (1.85 mg/g), protein content (9.06%), oil content (1.471%) and oil yield (33.04 kg/ha) and proved superior to all the above parameters over weedy check and pre emergence with the application of oxadiargyl @ 75 g/ha. Application of pendimethalin @ 0.75 kg/ha (PE) + one hand weeding at 30 DAS, oxadiargyl @ 75 g/ha (PE) + one hand weeding at 30 DAS and pendimethalin @ 0.75 kg/ha (PE) 0.75 kg/ha were found the most remunerative and equally effective treatment with two HW treatment in all the above parameters.