1. Banana Peel: Rich in potassium, banana peels can promote flowering and leaf color in poinsettias. Boil a banana peel in water for a few minutes, allow it to cool, and use the banana-infused water to water your poinsettia.
2. Hair: Human or pet hair contains nitrogen, which can stimulate plant growth. Collect hair that you naturally lose during grooming and place it directly in the soil of your poinsettia.
3. Coffee Grounds: Coffee grounds are another source of nitrogen, which can benefit poinsettias. You can mix used coffee grounds with the soil or sprinkle them on top. Make sure the coffee grounds are at room temperature before applying them.
4. Eggshells: Eggshells are rich in calcium carbonate, which can nourish the plant and deter pests. Crush eggshells into a fine powder and sprinkle it over the soil. This can also help with soil pH.
5. Lentil Sprouts: Lentil sprouts can serve as both a fertilizer and a rooting agent. Blend the lentil sprouts with a little water, strain the mixture, and then apply the liquid to your poinsettias.

Remember to use these natural fertilizers in moderation, as over-fertilization can harm your poinsettias. Also, ensure that your poinsettias receive the appropriate amount of light, water, and care to keep them looking their best throughout the holiday season.