How should you raise the pH level of a poinsettia plant?

add a drop or two of ammonia to your water.

How should you raise the pH level of a poinsettia plant?
To raise the pH level of a Poinsettia Plant use 1 tablespoon of Baking soda in 1 gallon of water and rinse the root one time per week.
Reply:Why? I'm assuming you mean the soil, not the plant.



Add calcium carbonate or wood ash to the soil. Or very dilute potassium hydroxide.
Reply:To raise the pH level of a Poinsettia Plant use 1 tablespoon of Baking soda in 1 gallon of water and rinse the root one time per week.