<![CDATA[Background: Garlic (Allium sativum L.) is a common horticultural commodity used as a spice and traditional medicine. A challenge in garlic cultivation was meeting the increasing market demand, while production in Indonesia had declined, necessitating large-scale imports. One of the problems in garlic cultivation was the mismatch of agroclimatic conditions, such as photoperiod, which resulted in suboptimal growth. This study aimed to investigate the effects of photoperiod and planting media composition on the growth and yield of Sangga Sembalun garlic. Method: The planting site was located at the agroclimate station of the Faculty of Agriculture, Universitas Pembangunan Nasional “Veteran” Jawa Timur, at an altitude of 5 meters above sea level. A split-plot design was applied, with photoperiod as the main plot and planting media composition as the subplot. The photoperiod treatments consisted of three levels: 12 hours (F1), 14 hours (F2), and 16 hours (F3), while the planting media treatments also had three levels: soil (K0), 1:1:1 soil: goat manure: rice husk charcoal (K1), and 2:1:1 soil: goat manure: rice husk charcoal (K2). Result: Photoperiod and growing medium composition influenced initial garlic growth but had no significant effect on subsequent growth. A porous medium with high organic matter promoted increased clove diameter and weight, while photoperiod tended to increase bulb production. However, in this study, neither treatment had any effect because garlic showed poor adaptation to lowland conditions. Conclusion: The interaction between a 12-hour photoperiod and growing medium composition (1:1:1 soil, rice husk charcoal, and manure) had a significant effect on garlic plant height at 14 and 21 days after planting. However, at later growth stages, the effects of photoperiod and growing medium composition were not significant for the observed parameters. Overall, garlic growth and yield in this study were relatively low, indicating that the tested variety was not well adapted to lowland conditions.]]>
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