There appears to be a bug with items with relatively long craft times, but short spoil times, and the freshness of the resulting item (even when result_is_always_fresh = true).

Steps to recreate:
Mod the following scenario:
Mod the recipe for an item (custom, or just use iron bacteria) with a short ...

Thanks so much for the explanation, that all makes sense, and your quite right I didn't realise that quality was supported on other entities that weren't EntityWithOwner.

A small follow-up:
Would it be possible for you to lead me in the direction of some resource that shows how you achieved your ...

Tree prototype currently inherits from EntityWithHealth only, plants the player are farming are inherited from trees.
Plants as entities can never be modded to have a quality value due to this.

While I appreciate devs don't want quality plantables on base game, it should be at least _possible_ to ...

Heres a link to the new mod!

https://mods.factorio.com/mod/quality-seeds

If anyone finds a way to make Trees actuallyretain their quality, let me know please!

As an update:

I was not able to find a reasonable system for having plant prototypes convey their quality when harvested.

However, I have made a mod, which I think is really in keeping with the base game, and is called quality-seeds, it will be uploaded shortly, have a look!

Hi all,

I am trying to make a mod that allows planting of quality seeds to retrieve quality fruits.

This has turned out difficult because the harvestable trees are of type "plant" which cannot be assigned a quality as they are not items, and I suspect only plants are used by the agricultural tower ...