{
  "page": "/us/lifespan/mulch",
  "built_from": "data/lifespan/facts/mulch.json",
  "rows": [
    {
      "type": "Bark chips and composted bark mulch in USDA backyard guidance; conditional life, not fixed replacement interval.",
      "measure": "conditional bark mulch longevity",
      "value": "1",
      "value_high": "3",
      "unit": "years or more; may last",
      "source": "USDA NRCS, Backyard Conservation: Mulching",
      "url": "https://nrcspad.sc.egov.usda.gov/distributioncenter/pdf.aspx?productID=48",
      "data_years": "April 1998 guidance",
      "read": "2026-11-05",
      "area": "national",
      "n": "not published by the source",
      "se_points": "",
      "fact_id": "mulch-bark-life"
    },
    {
      "type": "Wood chips in Iowa small-farm/garden mulch treatment guidance.",
      "measure": "conditional wood-chip treatment longevity",
      "value": "2",
      "value_high": "3",
      "unit": "years; can last",
      "source": "USDA NRCS Iowa, Small Farms: Mulching",
      "url": "https://www.nrcs.usda.gov/sites/default/files/2025-08/Mulching%20Fact%20Sheet_IA%20NRCS_2025.pdf",
      "data_years": "July 2025 guidance",
      "read": "2026-11-05",
      "area": "Iowa",
      "n": "not published by the source",
      "se_points": "",
      "fact_id": "mulch-wood-life"
    },
    {
      "type": "NRCS coarse mulch minimum and fine mulch maximum thickness, small-farm/garden scope.",
      "measure": "guidance",
      "value": "2",
      "value_high": "",
      "unit": "inches",
      "source": "USDA NRCS Iowa, Small Farms: Mulching",
      "url": "https://www.nrcs.usda.gov/sites/default/files/2025-08/Mulching%20Fact%20Sheet_IA%20NRCS_2025.pdf",
      "data_years": "July 2025 guidance",
      "read": "2026-11-05",
      "area": "Iowa",
      "n": "not published by the source",
      "se_points": "",
      "fact_id": "mulch-depth"
    }
  ]
}