How to Fertilize Poinsettia
When Should I Start Feeding My Poinsettia?
Because Poinsettias need a strict dark period in fall to trigger bract coloring, your feeding schedule should follow the natural light cycle in your region.
How Often Should I Fertilize My Poinsettia?
Feed every two weeks from spring through early fall, when the plant is actively producing new leaves and stems. This is the period when your Poinsettia is building the energy reserves it needs for its colorful display later.
Begin tapering in early October. Reduce to once a month at half strength for a few weeks, then stop completely. Feeding during the bract-coloring phase can delay or reduce the color change.
If you see leaf edges turning brown or white crust on the soil surface, you may be feeding too much. Flush the soil with plain water and skip the next feeding. Pale, small new leaves during spring or summer can signal too little fertilizer.
What Is the Best Fertilizer for Poinsettia?
A balanced liquid fertilizer with an even NPK ratio like 10-10-10 or 20-20-20 works well for Poinsettias. The equal nutrient spread supports both the lush green foliage that grows through summer and the colorful bracts that develop in fall.
Dilute to half the label rate each time you feed. Poinsettias are sensitive to salt buildup in the soil, so a lighter, more frequent approach is safer than occasional heavy doses.
Liquid fertilizer is the best format because it distributes evenly through the root zone. Slow-release granules can work during the summer growth phase, but switch to liquid in early fall so you can stop feeding quickly when the bract-coloring period begins.