Just make it so the recipe calls for both NPK and Compost. Fertilizer's fertilizer afterall.

The mod for fertilizer crafting is gone/down. Could you update this mod, to maybe either add that fertilizer recipe to the mod, or maybe add a second option instead of fertilizer to use (like animal excrement) to make gunpowder?

thank you

Does compost work too or just industrial fertilizer?

Wondering the same as the last fella. Assuming, since no one has been complaining and 6000 people are subbed, that it is working.

still works b42.2?

Now there's a mod for Fertilizer crafting:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3401653098

Fertilizer is found in the world.
https://pzwiki.net/wiki/NPK_Fertilizer

You can also find it by Foraging.

what is needed to make fertilizer ?

In vanilla, you can make pipebombs. Other mods use it too.