{
  "type": "minecraft:random_patch",
  "config": {
    "tries": 32,
    "xz_spread": 7,
    "y_spread": 3,
    "feature": {
      "feature": {
        "config": {
          "to_place": {
            "entries": [
              {
                "data": {
                  "Name": "minecraft:grass"
                },
                "weight": 3
              },
              {
                "data": {
                  "Name": "minecraft:fern"
                },
                "weight": 1
              }
            ],
            "type": "minecraft:weighted_state_provider"
          }
        },
        "type": "minecraft:simple_block"
      },
      "placement": [
        {
          "type": "minecraft:block_predicate_filter",
          "predicate": {
            "predicates": [
              {
                "blocks": [
                  "minecraft:air"
                ],
                "type": "minecraft:matching_blocks"
              },
              {
                "predicate": {
                  "offset": [
                    0,
                    -1,
                    0
                  ],
                  "blocks": [
                    "minecraft:podzol",
                    "coarse_dirt",
                    "rooted_dirt"
                  ],
                  "type": "minecraft:matching_blocks"
                },
                "type": "minecraft:not"
              }
            ],
            "type": "minecraft:all_of"
          }
        }
      ]
    }
  }
}
