Poinsettias are a holiday favorite, but maintaining their vibrant look requires the right nutrients. Common deficiencies like calcium, magnesium, and molybdenum can affect their growth, causing browning leaves or yellowing. To address these issues, ensure proper water uptake and pH balance. Monthly magnesium sulfate applications and foliar sprays can also help. For optimal results, use Plant Prod’s 18-6-20 Poinsettia Plus fertilizer, designed to prevent deficiencies and promote healthy growth.