That sounds really cool. Moss has such a delicate, layered structure that lets it soak up water while staying almost invisible. I’ve spent hours photographing those tiny ridges—there’s a rhythm to how the cells spread. If you could mimic that natural, low‑profile pattern, the sensors might blend in and even respond to moisture changes like the moss does. It’s a neat idea to explore.

Sounds like a solid plan. I’ve found a few cheap resistive probes that match what you need – you can grab the datasheet from Adafruit or SparkFun, they usually have a PDF with the pinout and a typical resistance vs. moisture chart. For a quick test schedule: Day 1 – Set up a small test plot with different soil types, install a couple of probes, log readings every hour for 12 hours to see baseline moisture swings. Day 2 – Add the silicone housings to the probes, attach the servos, and run a 6‑hour loop where the servo rotates every 15 minutes. Watch the readings to see if the sensor still stays within the 30 % threshold. Day 3 – Run a 12‑hour continuous test in a shaded, natural underbrush area. Make sure the fail‑safe triggers when moisture drops below 30 %, then document the time and condition when it retreats. That should give you a good idea of performance before you go full‑scale. Good luck!