{
  "schema_version": 1,
  "record_type": "plant",
  "slug": "brussels-sprouts",
  "common_name": "Brussels sprouts",
  "botanical_name": "Brassica oleracea var. gemmifera",
  "family": "Brassicaceae",
  "summary": "Brussels sprouts are tall long-season brassicas that need firm fertile soil, steady moisture, wide spacing and cool conditions while their many stem-borne sprouts mature.",
  "categories": [
    "brassica",
    "cool-season crop",
    "winter crop"
  ],
  "growth_habits": [
    "upright",
    "single-stemmed"
  ],
  "lifecycle": "Biennial, grown as an annual",
  "difficulty": "Moderate",
  "requirements": {
    "light": {
      "minimum_direct_sun_hours": 6,
      "preferred_direct_sun_hours": 8
    },
    "soil_ph": {
      "minimum": 6.0,
      "maximum": 7.0
    },
    "container": {
      "minimum_volume_litres": 20,
      "minimum_diameter_cm": 30,
      "plants_per_container": 1
    },
    "spacing": {
      "minimum_cm": 60,
      "maximum_cm": 75
    },
    "planting_out": {
      "minimum_reliable_temperature_c": 5,
      "frost_tolerant": true,
      "label": "Plant out",
      "note": "Harden sturdy transplants and firm them into their final site"
    },
    "harvest": {
      "typical_uk_months": [
        "September",
        "February"
      ]
    }
  },
  "sources": [
    {
      "id": "rhs-growing-brussels-sprouts",
      "publisher": "Royal Horticultural Society",
      "url": "https://www.rhs.org.uk/vegetables/brussels-sprouts/grow-your-own",
      "supports": [
        "types",
        "site",
        "soil_ph",
        "spacing",
        "containers",
        "harvest"
      ]
    },
    {
      "id": "umn-growing-brussels-sprouts",
      "publisher": "University of Minnesota Extension",
      "url": "https://extension.umn.edu/vegetables/growing-brussels-sprouts",
      "supports": [
        "soil_ph",
        "sowing",
        "water",
        "rotation",
        "pests",
        "harvest"
      ]
    }
  ]
}