Here's one of the spots where it's used and doesn't work:
{
"Drop chance when harvesting (1 = 100%)": 0.3,
"Drop amount when harvesting": {
"min": 1,
"max": 5
},
"Biome mask (see description for details)": 15,
"Minimum amount of H genes for a chance to yield weed": 4,
"Minimum amount of H genes for guaranteed yield": 4,
"Disable gathering from collectable hemp": false,
"Disable gathering from growable hemp": false,
"Custom item name (null = default name)": "Sugar John",
"Item short name": "sticks",
"Item skin id": 3058240185
},