This research aims to determine the effect and the best dose of trichocompost on the growth and yield of flower cabbage in ultisols. This research was conducted in July - October 2019 at the Mustika Griya Cantik complex B167, Cindai Alus Village, Banjar Regency, South Kalimantan Province. This study used a single factor completely randomized design (CRD), namely trichocompost fertilizer consisting of 7 levels of treatment repeated 4 times so that 28 experimental units were obtained and each experimental unit was repeated twice so that the total experiment was 56 units. The treatments used were k0: without trichocompost fertilizer, k1: trichocompost fertilizer 7.5 t ha^-1, k2: 15 t ha^-1, k3: 22.5 t ha^-1, k4: 30 t ha^-1, k5: 37.5 t ha^-1, k6: 45 t ha^-1. The results of this study showed the effect of trichocompost on plant height at 28 days after planting, lots of leaves aged 7 days, 14 days, 28 days, and 35 days, flower emergence time, flower diameter And the best or dominant dose is more stable as seen from the results of the study, namely the dose of 37.5 t ha^-1.