Highland floriculture in Bali is increasingly relevant for supporting tourism-associated ornamental flower supply, rural livelihoods, and green economy-oriented agricultural diversification. However, commodity-specific agroecological evidence for high-value ornamental crops remains limited, particularly for Anthurium andraeanum, because explicit suitability criteria for this species are not available in the Indonesian land evaluation guideline. This study developed and applied a modified land-unit-based actual-to-potential agroecological suitability assessment for anthurium in Baturiti District, Bali, Indonesia. The assessment was conducted using 16 homogeneous land units covering 9,204.14 ha, derived from field surveys, laboratory soil analysis, climate records, and spatial interpretation. The modified assessment combined the standard land-matching structure, Indonesian agricultural land evaluation criteria, published agronomic knowledge of anthurium, and explicit improvement rules for manageable land limitations. The evaluated land characteristics included temperature, rainfall, drainage, texture, effective soil depth, nutrient retention and availability, salinity, slope, erosion hazard, surface rock, and rock outcrop. Actual suitability was dominated by S3, covering 5,734.55 ha or 62.30%, followed by N with 1,866.68 ha or 20.28%, and S2 with 1,602.91 ha or 17.42%. After feasible improvement measures were considered, potential S2 increased to 8,847.75 ha or 96.13%, while 356.39 ha or 3.87% remained S3 due to persistent texture limitation. The main limiting factors were slope, drainage, soil depth, rainfall, temperature, texture, and total nitrogen. The results were translated into priority development, conservation-controlled, drainage-improvement, and restricted management zones, providing a reproducible land-unit-based basis for targeted anthurium development in Bali’s highland floriculture landscape.