... 0%, K2O:18-22%, I≥400ppm; much secondary element and microelements, cytokinin, betaine, vitamine, trehalase, amino acid.Efficacy ... 3~4 times in whole growing period.The crops with several picking: To spray after each picking.Drip ... Irrigation: to dilute it with water for 1500-2000 times. Dosage: 1.5 ... spraying.Validity: Three years seaweed extract powder with high potassium