Abstract: This two-season field experiment investigated the impact of spacing and variety onmaize (Zea mays L.) growth and yield in Makurdi, Nigeria. Two maize varieties (Sammaz 51and Sammaz 14) were evaluated at three spacing regimes (15, 20, and 25 cm). A randomizedcomplete block design with three replications was employed. Physiological and yield-relatedtraits were assessed, including, plant height, the number of leaves, stem diameter, andadventitious roots per plant, were measured. Other characters like stem girth, Adventurousroot, Cob length, Cob diameter, Number of line per cob, Number of cob/plant, number of seedper cob, Shelling (%), 1000 seed weight and Yield (t/ha) were also recorded. The results of theinvestigation revealed that maize generally responded to both spacing and variety. All theparameters studies have significantly (P ≤ 0.05) responded to varietal effects, the use ofSammaz 14 was observed to perform higher in both growth character such plant height(123.30),the number of leaves (16.27), stem girth (5.98), adventitious roots per plant (6.10), Cob length(14.67), Cob diameter (9.22), Number of line per cob (15.30), Number of cob per plant (2.74),number of seed per cob (620.43), Shelling (80.92 %), 1000 seed weight(952.43g) and Yield(5.42t/ha) Maize grown in spacing 15cm outgrows those cultivated in spacing 20 and 25cm inboth vegetative and reproductive character such as plant height (137.54), the number of leaves(16.24), stem girth (5.00), Adventurous root (6.01), Cob length (15.21), Cob diameter (9.73),Number of line per cob (16.54), Number of cob per plant (2.90), number of seed per cob(621.32), Shelling (85%), 1000 seed weight (901.65g) and Yield (5.54t/ha). On seasonal effectthe cultivation of maize in 2024 remained superior in all the parameters under consideration.Optimal maize production in Makurdi can be achieved using 15 cm spacing and Sammaz 14.Based on the results obtained it can be suggested that famers in the location can use spacing15cm and Sammaz 14 boast maize production for optimum yield.