Bug? Monkeytails can be fertilized when they can be harvested.

Use books to grow monkeytail/grass reduces 1 harvest time, and you pick it also reduces 1 harvest times.

Suppose that a monkeytail can be harvested for 5 times,you read and pick it twice(-2*2), then read book(-1), it has 0 harvest times, can be harvested or fertilized. If you fertilized it, you waste 1 harvest time.

This happens with all types of berry bush, monkeytail(NOT MENTIONED IN SCRAPBOOK) and grass(20)(pick once(-1),then read and pick 9 times(-2*9), read again(-1)). No effects on Banana bush, transplanted stone fruit bush and mushroom planter.