Drip irrigation, with or without recycling of the drainage solution, and subirrigation (flux and reflux) were compared for their effect on pot-grown poinsettia (Euphorbia pulcherrima cv. Cortez). The closed systems eliminated runoff and resulted in increased efficiency of water and nutrient use without impairing plant growth and characteristics. The composition of the re-circulating solution changed slightly but there was no need to replace it. Subirrigation had no effect on the plant-substrate interaction but resulted in a higher accumulation of salts in the substrate than with drip irrigation.