Why is my poinsettia dropping leaves since I brought it home from the store?

Poinsettia leaf drop is most often tied to watering. Iowa State University Extension and Outreach says improper watering is the most common reason poinsettias drop leaves. Check the soil, the decorative pot cover and the spot where the plant sits. Cold, drafts, heat and pests can also play a part.

Updated 27 October 2026

What usually makes a poinsettia drop its leaves?

Iowa State University Extension and Outreach says poinsettia leaf drop is likely due to environmental stress. It says improper watering is the most common reason poinsettias drop leaves.

Iowa State also says many problems seen in houseplants are not caused by just one factor. They are the result of several factors coming together. So look at watering, temperature, light and pests before you decide. Clemson Cooperative Extension lists temperatures below 50 °F, poor light and poor nutrition as factors that can cause premature leaf drop. For leaf drop on other plants, see our general leaf drop guide.

Make a single change at a time so you can see what helps.

Is cold or heat making your poinsettia drop leaves?

Cold and sudden temperature changes can make a poinsettia drop leaves. A new plant may also have had a cold trip home.

The Royal Horticultural Society says drooping or leaf-dropping poinsettias in shops are most commonly the result of being displayed in cold, drafty atriums or on chilly pavements. Iowa State says that if plants were not protected from cold in transport, leaves are likely to yellow and drop.

If your poinsettia wilts and drops leaves or bracts once you get it home, the Royal Horticultural Society says it will usually keep getting worse, likely because of cold storage or display in the shop. If the drop doesn’t start until later, it says to check that the plant is warm, light and the compost just moist. Dropping should stop if you improve those conditions.

These temperature limits come from the sources:

• Iowa State says poinsettias prefer temperatures between 60 and 70°F.
• Clemson Cooperative Extension says the daytime temperature should not exceed 70 °F.
• The Royal Horticultural Society gives a minimum of 13-16°C. It says cooler conditions cause physiological shock, so plants drop leaves and bracts.
• Clemson says chilling injury can cause premature leaf drop if the temperature falls below 50 °F.
• Iowa State says even a brief exposure to freezing temperatures may cause leaves to blacken and drop.

Your home can cause trouble too. The Royal Horticultural Society says cool, drafty temperatures at home can also be an issue. Iowa State says warm, dry air from a furnace register, or rapid temperature changes such as near a door, can also cause leaf drop. Clemson says to keep the plant away from drafts, excessive heat and dry air from appliances, fireplaces or ventilating ducts.

For a spot, the Royal Horticultural Society suggests bright light out of direct sunlight and away from drafts, such as on a table a little away from a window. It says to avoid window sills with drying radiator heat, cold night temperatures behind curtains, drafty hearths and unheated rooms like porches.

Is the watering making your poinsettia drop leaves?

Watering is worth checking on any poinsettia that is dropping leaves. Both too much and too little water can cause it.

Iowa State says overwatering will cause the lower leaves to turn yellow and drop. It also says plants allowed to get too dry will wilt and also drop leaves. Keeping plants too wet often results in yellowing and loss of the lower leaves, and it can lead to root rot. Iowa State says Pythium and Rhizoctonia root rots typically occur when plants are watered too frequently and the potting soil stays saturated. Clemson says root rotting fungi can occur in overwatered or poorly drained soils. Our guide to overwatering versus underwatering can help you sort out which problem you have.

1. Check the soil. Iowa State says to check the potting soil daily and water when the surface is dry to the touch. Our guide on how to tell if a plant needs water covers other checks.
2. Water well. Iowa State says to water until water begins to flow out the bottom of the pot.
3. Lift out the pot cover. Iowa State says to remove the poinsettia from its decorative pot cover, water it in the sink, then put it back in the cover.
4. Let it drain. Iowa State says never to let water collect and sit in the pot cover or saucer. The Royal Horticultural Society suggests standing the pot in tepid water for 10-20 minutes so the compost soaks it up, then letting it drain.
5. Don’t let it dry out. Clemson says never to let the potting medium dry out completely and never to let the plant sit in standing water.

Could light or pests be part of the problem?

Light and pests can both play a part in poinsettia leaf drop. Check them if the soil and temperature look fine.

Clemson says a poinsettia should get at least 6 hours of bright, indirect sunlight each day. Iowa State says light that is too high or too low, or a sudden change in light, can cause leaf drop. When you move a plant, change the light gradually. Our guide on how much light a houseplant needs has more on reading your light.

Clemson says whitefly is the most common poinsettia pest. Others include mealybugs, soft scales and spider mites. See our pages on mealybugs and spider mites if you see signs of those.

Iowa State says heavy whitefly infestations may cause stunting or yellowing of leaves, leaf drop and a decline in plant health. It says whiteflies flutter about the plant for a short time when disturbed. It also says whiteflies on poinsettias are extremely difficult to control, so prevention is the best strategy. That means looking over a plant closely before you buy it.

How do you match the signs to a cause?

Start with what you see on the plant, then check the matching item. If the signs overlap, go through the rows in turn.

Plant Doctor, an AI plant diagnosis app for iPhone, reads three photos and names the most likely cause along with the evidence behind it.

Poinsettia questions