{
  "schema_version": 1,
  "record_type": "plant",
  "slug": "kohlrabi",
  "common_name": "Kohlrabi",
  "botanical_name": "Brassica oleracea var. gongylodes",
  "family": "Brassicaceae",
  "summary": "Kohlrabi is a fast cool-season brassica grown for its crisp swollen stem, which stays tender with steady moisture and timely harvest.",
  "categories": [
    "stem vegetable",
    "brassica",
    "cool-season crop",
    "container crop"
  ],
  "growth_habits": [
    "upright rosette",
    "swollen stem"
  ],
  "lifecycle": "Biennial usually grown as an annual",
  "difficulty": "Easy",
  "requirements": {
    "light": {
      "minimum_direct_sun_hours": 4,
      "preferred_direct_sun_hours": 6
    },
    "soil_ph": {
      "minimum": 6.0,
      "maximum": 7.5
    },
    "container": {
      "minimum_volume_litres": 20,
      "minimum_diameter_cm": 30,
      "plants_per_container": 3
    },
    "spacing": {
      "minimum_cm": 15,
      "maximum_cm": 30
    },
    "planting_out": {
      "minimum_reliable_temperature_c": 10,
      "frost_tolerant": true,
      "label": "Sow or plant",
      "note": "Established plants tolerate light frost, but prolonged chilling of young plants can induce bolting; harden transplants gradually."
    },
    "harvest": {
      "typical_uk_months": [
        "May",
        "December"
      ]
    }
  },
  "sources": [
    {
      "id": "rhs-growing-kohlrabi",
      "publisher": "Royal Horticultural Society",
      "url": "https://www.rhs.org.uk/vegetables/kohl-rabi/grow-your-own",
      "supports": [
        "site",
        "sowing",
        "temperature",
        "spacing",
        "container_dimensions",
        "watering",
        "bolting",
        "crop_protection",
        "harvest_window"
      ]
    },
    {
      "id": "umn-growing-kohlrabi",
      "publisher": "University of Minnesota Extension",
      "url": "https://extension.umn.edu/vegetables/growing-kohlrabi",
      "supports": [
        "botanical_name",
        "soil_ph",
        "rotation",
        "sowing",
        "spacing",
        "watering",
        "pests",
        "diseases",
        "harvest",
        "storage"
      ]
    },
    {
      "id": "iastate-growing-kohlrabi",
      "publisher": "Iowa State University Extension and Outreach",
      "url": "https://yardandgarden.extension.iastate.edu/how-to/growing-kohlrabi-home-garden",
      "supports": [
        "family",
        "light",
        "soil_ph",
        "soil",
        "rotation",
        "sowing",
        "harvest"
      ]
    },
    {
      "id": "ncsu-kohlrabi-group",
      "publisher": "NC State Extension",
      "url": "https://plants.ces.ncsu.edu/plants/brassica-oleracea-kohlrabi-group/common-name/german-turnip/",
      "supports": [
        "identity",
        "family",
        "growth_habit",
        "lifecycle",
        "light",
        "frost_tolerance",
        "harvest"
      ]
    }
  ]
}