For those who have an absence of potassium in your soil, a fertilizer higher in potassium (the 3rd range mentioned with a fertilizer package deal) can complement this critical nutrient.  Compost or manure may insert some potassium to the soil.H?c vi?n good farmer Tr?ng cây doanh nghi?p Tr?ng cây nông nghi?p L?ch ?ào t?o ??ng ký m? c?a hàngPl