<![CDATA[Efficient water management is essential for sustainable horticultural production, particularly for high-value crops such as celery (Apium graveolens L.). Conventional irrigation methods often result in significant water losses, emphasizing the need for more precise irrigation systems. Drip irrigation offers improved water efficiency by maintaining soil moisture within the root zone; however, its effectiveness is influenced by irrigation duration. This study evaluated the effects of different drip irrigation durations on the growth and yield of celery and identified the optimal irrigation duration under greenhouse conditions. The experiment was conducted from December 2024 to September 2025 at the greenhouse of the Faculty of Agriculture, University of Borneo Tarakan, using a randomized complete block design with four treatments and six replications. The treatments included manual watering and drip irrigation applied for 10, 15, and 20 minutes. Growth and yield parameters observed were plant height, number of leaves, number of tillers, fresh weight, and dry weight. Data were analyzed using analysis of variance followed by the least significant difference test at the 5% level. The results showed that irrigation duration significantly affected all measured parameters. Drip irrigation applied for 20 minutes consistently produced the highest growth and yield, resulting in the greatest plant height (17.78 cm), number of leaves (11.78), number of tillers (4.33), fresh weight (64.03 g), and dry weight (11.17 g). These findings suggest that a 20-minute drip irrigation duration is optimal for improving celery growth and yield under greenhouse conditions.]]>
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