The University of Florida Institute of Food and Agricultural Sciences Citrus Research and Education Center recently hosted its annual Finger Lime Field Day at the Plant Science Research and Education Unit in Citra. The event, led by citrus breeder Manjul Dutt, brought together researchers, growers and industry stakeholders to explore the growing potential of finger limes in Florida. Often called “citrus caviar” for their bead-like juice vesicles, finger limes are attracting attention not only as a high-value specialty crop but also for their tolerance to huanglongbing (HLB).
COLD TOLERANCE
Native to the subtropical rainforests of eastern Australia, finger limes have adapted well to many Florida growing conditions. A major focus of the field day was how different finger lime varieties responded to recent cold events. Researchers reported that young trees can be vulnerable to freeze damage, particularly during brief winter cold snaps. However, healthy trees older than two years generally recover quickly.
Among the cultivars evaluated, UF RedLime emerged as the most cold-tolerant selection. Following the 2026 freeze, UF RedLime trees experienced minimal losses and still produced a commercial crop. In contrast, UF SunLime sustained greater injury, including approximately 8% tree loss and minimal fruit production after the freeze. The findings underscore the importance of variety selection as finger lime acreage expands across the state.
HARVEST MATURITY AND POSTHARVEST MANAGEMENT
Researchers also shared new information on harvest maturity and postharvest management. Studies have shown that UF RedLime reaches optimal harvest maturity in early September, whereas US SunLime is best harvested in mid-October.
Storage trials demonstrated that fruit quality is best maintained near 50 degrees. Coconut oil coatings helped reduce chilling injury during cold storage, suggesting opportunities to improve marketability and shelf life.
One of the most exciting findings concerned the fruit’s distinctive juice vesicles. Research showed that extracted vesicles can remain marketable for nearly two months under refrigerated conditions, a significant advantage for food service and specialty product markets.
CONSUMER AND CULINARY POTENTIAL
Consumer panels preferred red vesicles over white ones, largely due to their visual appeal. The highly acidic nature of finger lime vesicles, with pH values ranging from 2.3 to 2.8, also contributes to food safety by limiting microbial growth.
The culinary potential of finger limes was another major topic. Researchers explored applications in restaurants, bars and craft cocktail programs, showing that the fruit can be used far beyond simple garnishes. Finger limes can be incorporated into syrups, beverages, sauces and innovative menu items.
Surveys of consumers, mixologists, growers and Extension professionals indicated strong interest in the crop. Appearance, consistency and versatility were identified as key drivers of market acceptance.
PESTS AND DISEASES
Pest and disease management remain important considerations. Although finger limes appear relatively tolerant of HLB, growers must still manage other pests, including root weevils, scale insects, mites and caterpillars. Researchers also discussed challenges posed by citrus canker and phytophthora, emphasizing the importance of proper rootstock selection and vigilant monitoring.
OPPORTUNITIES AHEAD
Overall, the field day highlighted that finger limes may offer Florida growers a valuable specialty crop opportunity. With cold tolerance, HLB tolerance, strong culinary appeal and promising market demand, finger limes are increasingly viewed as an important component of Florida’s future citrus industry. Continued research on production practices, pest management, postharvest handling and consumer adoption will help determine the extent of the commercial impact of finger limes in the years ahead.
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