{
  "schema_version": 1,
  "record_type": "plant",
  "slug": "rhubarb",
  "common_name": "Rhubarb",
  "botanical_name": "Rheum x hybridum",
  "family": "Polygonaceae",
  "summary": "Rhubarb is a large hardy perennial stem crop that needs a well-drained permanent site, several seasons to establish and enough foliage left after harvest to replenish its crown.",
  "categories": [
    "stem vegetable",
    "perennial crop",
    "cool-season crop"
  ],
  "growth_habits": [
    "crown-forming",
    "large clump"
  ],
  "lifecycle": "Herbaceous perennial",
  "difficulty": "Easy",
  "requirements": {
    "light": {
      "minimum_direct_sun_hours": 4,
      "preferred_direct_sun_hours": 6
    },
    "soil_ph": {
      "minimum": 5.5,
      "maximum": 6.5
    },
    "container": {
      "minimum_volume_litres": 40,
      "minimum_diameter_cm": 50,
      "plants_per_container": 1
    },
    "spacing": {
      "minimum_cm": 75,
      "maximum_cm": 90
    },
    "planting_out": {
      "minimum_reliable_temperature_c": 0,
      "frost_tolerant": true,
      "label": "Plant crowns",
      "note": "Plant dormant crowns with the growing point at or just above the surface"
    },
    "harvest": {
      "typical_uk_months": [
        "March",
        "July"
      ]
    }
  },
  "sources": [
    {
      "id": "rhs-growing-rhubarb",
      "publisher": "Royal Horticultural Society",
      "url": "https://www.rhs.org.uk/vegetables/rhubarb/grow-your-own",
      "supports": [
        "site",
        "planting",
        "spacing",
        "containers",
        "forcing",
        "harvest",
        "leaf_safety"
      ]
    },
    {
      "id": "umn-growing-rhubarb",
      "publisher": "University of Minnesota Extension",
      "url": "https://extension.umn.edu/vegetables/growing-rhubarb",
      "supports": [
        "soil_ph",
        "establishment",
        "watering",
        "flower_removal",
        "harvest"
      ]
    }
  ]
}