Aglaonema Pictum Tricolor should be fertilized once a month during the growing season (spring and summer) with a balanced, water-soluble fertilizer. Dilute the fertilizer according to the instructions on the package before applying to the soil. During the dormant season (fall and winter), reduce fertilization to once every two months or stop altogether. Overfertilization can lead to burnt leaves or root damage, so it is important to follow the recommended dosage.