Comfrey has these in abundance as it draws macronutrients from the soil and suppliers them from the leaves. Actually, comfrey has bigger potassium concentrations than compost. "The soil is the stomach in the plant," Thewlis claims. "With compost tea, microorganisms stop working minerals and natural matter for plant uptake." Also, https://johnnygikbx.digitollblog.com/35596487/a-simple-key-for-case-solution-unveiled