Human urine is freely available around the world and is composed of nitrogen (N), inorganic potassium (K), phosphorus (P), and other nutrients directly absorbable by plants. This resource was tested on several tropical horticultural species and showed rapid positive effect on plants growing. In the nursery: 3 trees and 1 vine species were treated with 50 mL urine (1/3) + water (2/3) and compared to control (50 mL of water). After 36 days of treatment, papaya tree, passion fruit vine, Serianthes myriadenia and Hibiscus tiliaceus treated with urine were significantly higher, greener and produced more leaves than control sister seedlings treated with water only. Human urine should be managed to keep valuable nutrients, benefiting for plants and food security and not treated as a waste product.