{
  "schema_version": 1,
  "record_type": "plant",
  "slug": "jerusalem-artichoke",
  "common_name": "Jerusalem artichoke",
  "botanical_name": "Helianthus tuberosus",
  "family": "Asteraceae",
  "summary": "Jerusalem artichoke is a vigorous hardy perennial sunflower grown for winter tubers, needing generous space, moisture while tubers swell and careful containment.",
  "categories": [
    "tuber vegetable",
    "perennial crop",
    "winter crop"
  ],
  "growth_habits": [
    "tall upright stems",
    "spreading underground tubers"
  ],
  "lifecycle": "Hardy herbaceous perennial",
  "difficulty": "Easy",
  "requirements": {
    "light": {
      "minimum_direct_sun_hours": 4,
      "preferred_direct_sun_hours": 6
    },
    "soil_ph": {
      "minimum": 5.5,
      "maximum": 7.0
    },
    "container": {
      "minimum_volume_litres": 50,
      "minimum_diameter_cm": 45,
      "plants_per_container": 1
    },
    "spacing": {
      "minimum_cm": 30,
      "maximum_cm": 45
    },
    "planting_out": {
      "minimum_reliable_temperature_c": 5,
      "frost_tolerant": true,
      "label": "Plant tubers",
      "note": "Plant dormant tubers from late winter to mid-spring in workable, freely draining soil"
    },
    "harvest": {
      "typical_uk_months": [
        "October",
        "March"
      ]
    }
  },
  "sources": [
    {
      "id": "rhs-growing-jerusalem-artichokes",
      "publisher": "Royal Horticultural Society",
      "url": "https://www.rhs.org.uk/vegetables/jerusalem-artichokes/grow-your-own",
      "supports": [
        "identity",
        "lifecycle",
        "site",
        "planting",
        "spacing",
        "containers",
        "watering",
        "support",
        "containment",
        "harvest",
        "storage",
        "problems"
      ]
    },
    {
      "id": "umn-soil-fertilising-guide",
      "publisher": "University of Minnesota Extension",
      "url": "https://extension.umn.edu/manage-soil-nutrients/quick-guide-fertilizing-plants",
      "supports": [
        "soil_ph_context",
        "soil_testing",
        "fertilising"
      ]
    }
  ]
}