An investigation was carried out to study the effect of six different plant geometry on growth and yield parameters of capsicum under open ventilated poly house at Horticultural Research Farm, B. A. College of Agriculture, Anand Agricultural University during 2016-17 and 2017-18. Healthy seedlings were transplanted in a plot size of 5.4 m x 2.8 m i.e. 15.12 m2in six different plant geometry i.e. T1: 45 × 30 cm, T2: 45 × 45 cm, T3: 45 × 60 cm, T4: 60 × 30 cm, T5: 60 × 45 cm and T6: 60 × 60 cm. Results of the experiment showed that maximum picking was obtained in plant geometry 45 x 30 cm and 60 x 30 cm. Whereas, the highest number of fruits per plant were recorded in plant geometry 45 x 60 cm and 45 x 30 cm. The highest yield kg/plant was obtained in plant geometry 45 x 60 cm. However, maximum yield (kg/plot and q/1000 m2) was recorded in plant geometry 45 x 30 cm. Thus, plant geometry 45 x 30 cm is most suitable for cultivation of capsicum under open ventilated poly house for getting higher yield.