Abstract
Low crop productivity is a general problem facing most farming systems in Nigeria and due to the increase in demand in urban areas where people are not involved in the primary production, the demand for vegetable amaranths has increased. Field trial was conducted during the 2022 cropping season, under rain fed condition at Teaching and Research Farm, Food and Agricultural Organization/Tree Crop Program (FAO/TCP) farm, Adamawa State University, Mubi. The treatments consisted of four Plant Growth Regulators (Gibberellins, Cytokinins, Indole butyric acid and Water as control). The Treatments were laid in a Randomized Complete Block Design replicated three times. Data were collected on plant height, stem girth, leaf area, dry matter weight, crop growth rate and fresh vegetable yield. Data collected were subjected to Analysis of Variance and treatments that showed significant differences were separated using Least Significant Differences at 5 % level of probability. The results showed that foliar application of gibberellins recorded the highest men values in all the growth and vegetable yield with 31.23 cm and 105.07 cm plant height, 5.59 mm 2 and 21.97 mm 2 Stem girth, 43.04 cm2 and 281.03 cm2 leaf area, 6.23 g and 28.23 g dry matter weight, at 3 and 6 WAS respectively. Similarly, higher crop growth rate of 8.38 g/m2 / day, and fresh vegetable yield (79.07 tones ha-1 ) at 6 weeks after sowing was also obtained from the application of gibberellins. For the best yield of vegetable amaranth (Amaranthus caudatus L.), foliar application of gibberellins was found to be promising and farmers are therefore advised to adopt its utilization in order boast amaranth production in the study area.