Fertilizer (LoH)

In Harvest Moon: Light of Hope, fertilizer comes in a multitude of varieties, many of which are crop-specific.

Fertilizer can be applied to any crop and helps grow first-generation mutations.

Crop-specific and super blends are required to achieve the more rare second- and third-generation mutations.

Fertilizer is recommended to be applied to crops once every four days for crops which are out of season, and recommended to be applied once a week for crops alive which are in season. (citation for "recommended"?)