Vol. 9, Special Issue 12, Part K (2025)

Coriander (Coriandrum sativum L.) is an important annual seed spice crop belonging to the family Apiaceae, cultivated widely for its seeds and fresh foliage. Its growth and productivity are greatly influenced by environmental and physiological factors; therefore, the application of plant growth regulators (PGRs) has gained importance for enhancing crop performance.

The present investigation entitled “Studies on the effect of plant growth regulators on seed germination and growth behaviour of coriander (Coriandrum sativum L.) under Durg district of Chhattisgarh” was conducted during 2024-25 at the Research and Instructional Farm, College of Horticulture and Research Station, Sankara, Patan, Durg (C.G.). The experiment was carried out to evaluate the effect of different concentrations of gibberellic acid (GA₃) on germination, growth, flowering, and yield attributes of coriander.

Among all the treatments, GA₃ at 150 ppm (T₃) exhibited superior performance by recording the highest germination percentage (83.67%), plant height (33.21, 62.06, and 77.01 cm at 30 days, 60 days, and at harvest, respectively), number of primary branches (3.86 and 8.32 at 30 and 60 days), and number of secondary branches (23.91). This treatment also resulted in the maximum number of umbels per plant (68.46) and umbellates per umbel (7.03), along with minimum days to first flowering (63.67) and 50% flowering (73.00).

Yield parameters were significantly improved with GA₃ at 150 ppm, which recorded the highest number of seeds per umbellate (7.66) and seeds per umbel (44.42), seed yield per plant (7.86 g), seed yield per plot (0.91 kg), and seed yield per hectare (18.65 q). The highest test weight (12.80 g) and harvest index (44.64%) were also obtained under the same treatment.

The study concludes that application of GA₃ at 150 ppm is most effective for improving germination, vegetative growth, flowering, and seed yield of coriander and can be recommended for achieving higher productivity under the agro-climatic conditions of the Durg district of Chhattisgarh.