{
  "schema_version": 1,
  "record_type": "plant",
  "slug": "horseradish",
  "botanical_name": "Armoracia rusticana",
  "categories": [
    "root vegetable",
    "perennial crop",
    "culinary herb"
  ],
  "common_name": "Horseradish",
  "difficulty": "Easy",
  "family": "Brassicaceae",
  "growth_habits": [
    "upright leaf rosette",
    "spreading roots"
  ],
  "lifecycle": "Hardy herbaceous perennial",
  "requirements": {
    "container": {
      "minimum_diameter_cm": 30,
      "minimum_volume_litres": 20,
      "plants_per_container": 1
    },
    "harvest": {
      "typical_uk_months": [
        "October",
        "December"
      ]
    },
    "light": {
      "minimum_direct_sun_hours": 4,
      "preferred_direct_sun_hours": 6
    },
    "planting_out": {
      "frost_tolerant": true,
      "label": "Plant dormant roots",
      "minimum_reliable_temperature_c": 0,
      "note": "Early spring in unfrozen, workable soil; temperature is a planning proxy, not a growth threshold"
    },
    "soil_ph": {
      "maximum": 7.5,
      "minimum": 6.0
    },
    "spacing": {
      "maximum_cm": 30,
      "minimum_cm": 30
    }
  },
  "summary": "Grow horseradish for pungent roots in a deep container or dedicated bed, with a clear plan for containment, seasonal care and harvest.",
  "sources": [
    {
      "id": "rhs-growing-horseradish",
      "publisher": "Royal Horticultural Society",
      "url": "https://www.rhs.org.uk/herbs/horseradish/grow-your-own",
      "supports": [
        "containers",
        "perennial_harvest",
        "watering"
      ]
    },
    {
      "id": "umn-growing-horseradish",
      "publisher": "University of Minnesota Extension",
      "url": "https://extension.umn.edu/garden-and-home/yard-and-garden/gardening-in-minnesota/growing-horseradish",
      "supports": [
        "planting",
        "spacing",
        "root_management"
      ]
    },
    {
      "id": "usu-growing-horseradish",
      "publisher": "Utah State University Extension",
      "url": "https://extension.usu.edu/yardandgarden/research/horseradish-in-the-garden",
      "supports": [
        "soil_ph",
        "fertilising",
        "watering",
        "annual_harvest"
      ]
    },
    {
      "id": "wisconsin-horseradish",
      "publisher": "University of Wisconsin Extension",
      "url": "https://hort.extension.wisc.edu/articles/horseradish-armoracia-rusticana/",
      "supports": [
        "identity",
        "lifecycle",
        "light",
        "containment",
        "pests",
        "preparation"
      ]
    },
    {
      "id": "iowa-horseradish-harvest",
      "publisher": "Iowa State University Extension",
      "url": "https://yardandgarden.extension.iastate.edu/faq/when-should-i-harvest-horseradish",
      "supports": [
        "harvest",
        "storage"
      ]
    }
  ]
}