diff --git a/homeassistant/components/yardian/sensor.py b/homeassistant/components/yardian/sensor.py
index 339233f21f4..3be0ddee76b 100644
--- a/homeassistant/components/yardian/sensor.py
+++ b/homeassistant/components/yardian/sensor.py
@@ -61,7 +61,6 @@ SENSOR_DESCRIPTIONS: tuple[YardianSensorEntityDescription, ...] = (
     YardianSensorEntityDescription(
         key="active_zone_count",
         translation_key="active_zone_count",
-        native_unit_of_measurement="zones",
         state_class=SensorStateClass.MEASUREMENT,
         value_fn=lambda coordinator: len(coordinator.data.active_zones),
     ),
diff --git a/homeassistant/components/yardian/strings.json b/homeassistant/components/yardian/strings.json
index 9856ffc0518..1f20b0a37b6 100644
--- a/homeassistant/components/yardian/strings.json
+++ b/homeassistant/components/yardian/strings.json
@@ -38,7 +38,7 @@
     "sensor": {
       "active_zone_count": {
         "name": "Active zones",
-        "unit_of_measurement": "Zones"
+        "unit_of_measurement": "zones"
       },
       "rain_delay": {
         "name": "Rain delay"