Use plants as a first line of defense by building natural buffer zones that slow or stop a threat. Dense, low‑maintenance shrubs or grasses can act as firebreaks, and vines can block sightlines for intruders. Choose native species that are drought‑resistant to keep maintenance low, and plant in a way that creates multiple layers: a hard outer fence, a soft plant barrier, then a final security perimeter. For early warning, consider scent‑oriented plants that release volatile compounds when stressed; a simple sensor can pick up those signals and trigger an alarm. Keep the system simple and redundant—one layer doesn’t replace the other, it just adds a low‑cost, low‑maintenance check.