Using plant-based actuators, experiments have shown that we can achieve a limited form of soft robots. In a recent paper An on-demand plant-based actuator created using conformable electrodes, they were able to use conformable electrodes to move Venus flytrap with a 1.3 second latency that can even be remotely controlled via an ESP8266 board.
Soft robots made from plants could be grown (maybe even from existing native species) and tailored to specific factory work tasks or farming. Imagine farming done by plant-based robots?