Resumo. The quality of seedlings of tree species is crucial to succeed in reforestation project or commercial exploitation. This work was to evaluate the influence of two environments (AMB-1, greenhouse; AMB-2, plastic camera installed inside the greenhouse) and concentrations of nutrients applied by fertigation (0; 50; 100 and 150% of a patterns nutrient solution) in the production of seedlings of Tabebuia aurea using design was completely randomized, with four replications. The following growth characteristics were evaluated: height, stem diameter, number of leaves, leaf area, dry matter aerial part, dry root matter, dry root weight, total dry matter, height/stem diameter ratio, specific leaf area, leaf area ratio and Dickson quality index (IQD). Data analysis revealed that there was significant interaction between the factors for most variables. The use of the plastic chamber (AMB-2) provided greater growth of Tabebuia aurea seedlings. Fertigation solutions with nutrient concentrations varying from 80 to 100% of the standard solution provide better quality Tabebuia aurea seedlings.