Quality fertilizer II

 is produced at the church workbench by combining the basic fertilizer peat with two flavor enhancer, the latter requiring advanced alchemy. Like all fertilizers, a single unit may be applied to a single farming plot - either an empty garden bed, garden bed with sticks, or vine trellis - in order to provide a benefit to the subsequently planted crop.

The benefit of a "Quality" fertilizer - note the star icon - is an overall improvement to a crop's yield. In regards to specifically, the given crop's return on average will be improved significantly. With basic crops, the produce will be increased by 6 and the seeds will be increased by 3. With quality crops, the produce and seeds will be increased by 2, as well as guaranteeing 2 upgraded produce and seeds. If the crop itself is already gold-quality, this benefit will simply be added to the return, or 4 extra produce and seeds total. For additional information regarding the effects and use of fertilizer, see farming.

Study
Spitzendünger II Engrais de Qualité II