Fertiliser Due

Fertiliser-Due

1. Create a template sensor

Put this in your configuration.yaml or under Helpers → Template in the UI:

```yaml
template:
  - sensor:
      - name: "Fertiliser Due"
        state: >
          {% set last_tap = states('tag.lemon_liquid_feed') %}
          {% if last_tap not in ['unknown', 'unavailable', 'none'] %}
            {% set last = as_datetime(last_tap) %}
            {% set months = ((now() - last).days / 30) | int %}
            {{ months >= 3 }}
          {% else %}
            false
          {% endif %}
        device_class: battery
        icon: mdi:leaf
```

This sensor will be "True" if it’s been 3 months or more since the last scan, otherwise "False".

2. Use a conditional card in your dashboard

```yaml
type: conditional
conditions:
  - entity: sensor.fertiliser_due
    state: "True"
card:
  type: markdown
  content: |
    🌱 **Fertiliser due!**
```