Fluorescent chemosensors are crucial for monitoring plant health and their environment in sustainable agriculture. These sensors offer high sensitivity, biocompatibility, and the ability to provide real-time, non-destructive monitoring of plant health indicators. They are used to detect various environmental factors, including abiotic and biotic stresses, nutrient utilization, and soil conditions, which are essential for maintaining plant health and ensuring food security. Fluorescent chemosensors have been developed in various forms, including small-molecule, nano, and supramolecular sensors, each with unique advantages in detecting specific plant-related parameters. Small-molecule fluorescent chemosensors, such as those based on coumarin, naphthalimide, and rhodamine derivatives, are widely used for monitoring plant health. Coumarin derivatives are particularly effective in detecting ions, hormones, and amino acids in plants. Naphthalimide derivatives are used for detecting ions, amino acids, pesticides, and pathogens. Rhodamine derivatives are known for their high sensitivity and photostability, making them suitable for detecting plant hormones and ions. Fluorescent nano-chemosensors, utilizing quantum dots, metal-organic frameworks, and covalent organic frameworks, offer high sensitivity and recyclability, making them ideal for monitoring plant environments. Supramolecular chemosensors, which form polymer and hydrogelator systems, provide high specificity and recyclability for monitoring plant health and food security. Despite their advantages, challenges remain in the development and application of fluorescent chemosensors, including synthesis costs, environmental impact, and the need for further research into new synthesis sites and recognition mechanisms. However, ongoing research continues to improve the efficiency and applicability of these sensors, promoting sustainable agricultural practices and enhancing the understanding of plant-environment interactions.Fluorescent chemosensors are crucial for monitoring plant health and their environment in sustainable agriculture. These sensors offer high sensitivity, biocompatibility, and the ability to provide real-time, non-destructive monitoring of plant health indicators. They are used to detect various environmental factors, including abiotic and biotic stresses, nutrient utilization, and soil conditions, which are essential for maintaining plant health and ensuring food security. Fluorescent chemosensors have been developed in various forms, including small-molecule, nano, and supramolecular sensors, each with unique advantages in detecting specific plant-related parameters. Small-molecule fluorescent chemosensors, such as those based on coumarin, naphthalimide, and rhodamine derivatives, are widely used for monitoring plant health. Coumarin derivatives are particularly effective in detecting ions, hormones, and amino acids in plants. Naphthalimide derivatives are used for detecting ions, amino acids, pesticides, and pathogens. Rhodamine derivatives are known for their high sensitivity and photostability, making them suitable for detecting plant hormones and ions. Fluorescent nano-chemosensors, utilizing quantum dots, metal-organic frameworks, and covalent organic frameworks, offer high sensitivity and recyclability, making them ideal for monitoring plant environments. Supramolecular chemosensors, which form polymer and hydrogelator systems, provide high specificity and recyclability for monitoring plant health and food security. Despite their advantages, challenges remain in the development and application of fluorescent chemosensors, including synthesis costs, environmental impact, and the need for further research into new synthesis sites and recognition mechanisms. However, ongoing research continues to improve the efficiency and applicability of these sensors, promoting sustainable agricultural practices and enhancing the understanding of plant-environment interactions.