(b) It is unlawful for any person to adulterate, misbrand, or alter any fertilizing material with the result that the fertilizing material would be inconsistent with the label claims. Any violation of this subdivision is a misdemeanor punishable by a fine as follows:

1. (1) Not more than five thousand dollars ($5,000) for the first violation that is not a knowing violation.
2. (2) Not more than fifteen thousand dollars ($15,000) for each subsequent unknowing violation.
3. (3) Not less than fifteen thousand dollars ($15,000) for each knowing violation.