Different harvest results for different seasons?

[NetSysFire]

I want to specify a different harvest result for a different season. In this case, I want the player to be able to harvest young leaves off walnut trees, which should not affect any later harvest.

"harvest_by_season": [ { "seasons": [ "autumn" ], "id": "walnut_harv" }, { "seasons": [ "spring" ], "id": "young_leaves_harv" } ]

This does not appear to work though. Is this a known limitation or am I using it wrong?

[NetSysFire]

It appears that this works correctly for furniture, but terrain such as trees do not regenerate correctly