minecraft-assets/data/minecraft/worldgen/placed_feature/flower_cherry.json

{
  "feature": "minecraft:flower_cherry",
  "placement": [
    {
      "type": "minecraft:noise_threshold_count",
      "above_noise": 10,
      "below_noise": 5,
      "noise_level": -0.8
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "type": "minecraft:heightmap",
      "heightmap": "MOTION_BLOCKING"
    },
    {
      "type": "minecraft:biome"
    }
  ]
}