{
  "title": "Storm Lake Harvest Calendar",
  "location": {
    "city": "Storm Lake",
    "state": "Iowa",
    "county": "Story",
    "zone": "5B",
    "coordinates": { "lat": 42.66, "lon": -93.74 }
  },
  "frost_window": {
    "last_spring_frost_avg": "2026-04-22",
    "first_fall_frost_avg": "2026-10-10",
    "uncertainty_days": 4,
    "source": "NOAA NCDC 30yr avg (Station USW00094177)"
  },
  "crops": [
    {
      "common_name": "Turnip (White Globe)",
      "scientific_name": "Brassica rapa subsp. rapa",
      "phases": [
        { "event": "Sow Indoors", "start_date": "2026-03-01", "end_date": "2026-03-15" },
        { "event": "Transplant Out", "start_date": "2026-04-26", "end_date": "2026-05-05" },
        { "event": "Thin", "date": "2026-05-12" },
        { "event": "Harvest", "start_date": "2026-07-20", "end_date": "2026-08-10" }
      ],
      "notes": "Row fabric required until June 15. Loose soil mandatory."
    },
    {
      "common_name": "Radish (French Breakfast)",
      "scientific_name": "Raphanus sativus",
      "phases": [
        { "event": "Sow Direct", "start_date": "2026-04-22", "end_date": "2026-06-10" },
        { "event": "Germination Period", "days": 4, "unit": "days" },
        { "event": "Harvest", "days_after_sow": 28 }
      ],
      "notes": "Succession sow weekly. Avoid overcrowding."
    },
    {
      "common_name": "Carrot (Nantes)",
      "scientific_name": "Daucus carota subsp. sativus",
      "phases": [
        { "event": "Sow Direct", "start_date": "2026-05-10", "end_date": "2026-07-01" },
        { "event": "Thinning", "date": "2026-06-20" },
        { "event": "Harvest", "start_date": "2026-10-15", "end_date": "2026-11-05" }
      ]
    },
    {
      "common_name": "Kale (Red Russian)",
      "scientific_name": "Brassica oleracea var. acephala",
      "phases": [
        { "event": "Sow Indoors", "start_date": "2026-06-01", "end_date": "2026-06-15" },
        { "event": "Transplant Out", "date": "2026-07-10" },
        { "event": "First Cut", "date": "2026-08-25" },
        { "event": "Overwinter Protection", "method": "straw mulch" }
      ]
    },
    {
      "common_name": "Beet (Detroit Dark Red)",
      "scientific_name": "Beta vulgaris subsp. vulgaris",
      "phases": [
        { "event": "Sow Direct", "start_date": "2026-07-15", "end_date": "2026-08-10" },
        { "event": "Harvest Tops", "date": "2026-09-01" },
        { "event": "Pull Roots", "deadline": "2026-10-10" }
      ]
    },
    {
      "common_name": "Parsnip (Harrow White)",
      "scientific_name": "Pastinaca sativa",
      "phases": [
        { "event": "Sow Direct", "start_date": "2026-05-15", "end_date": "2026-06-15" },
        { "event": "In-Ground Freeze Treatment", "start_date": "2026-11-01", "end_date": "2026-12-15" },
        { "event": "Harvest Frozen", "start_date": "2027-01-15", "end_date": "2027-03-01" }
      ],
      "notes": "Sugar conversion requires freeze exposure. Bitter if dug pre-freeze."
    }
  ],
  "metadata": {
    "author": "Barbara Cintron",
    "version": "1.0",
    "published": "2026-07-18",
    "homepage": "https://barbara-cintron.4ort.net/calendar.html",
    "license": "CC-BY-SA 4.0"
  }
}