The exploration of a novel substrate for green electronics sensors in precision agriculture holds immense promise. A compatible substrate would allow sensors to be directly integrated into plant tissues or placed in close proximity without impeding growth or causing physiological disturbances. This seamless integration would facilitate continuous and accurate monitoring of plant parameters, enabling early detection of stress, disease, or nutrient deficiencies. In this context, two novelties are proposed: the use of a flexible cellulose-based transparent biodegradable substrate and the use of a biodegradable transparent water-based cellulose-based glue for direct attachment on the leaves. Preliminary tests seem to indicate that such a system does not affect plant’s health, while guaranteeing a low environmental impact.