Plants · Holiday plants
Poinsettia care: light, water, pets, and the zones where it grows outside
Poinsettia (Euphorbia pulcherrima) is grown indoors for the holidays across most of the US. By the zone ranges below, it is rated for the ground in 9a–11b. Below the ranges are the dates that matter outdoors, each zone’s median freezes from NOAA records, and then the care advice of named extension services.
Published October 25, 2026 · Updated November 3, 2026 · Cite this page
The plant
Where it is rated to live outdoors
| Plant | Rated zones | Notes |
|---|---|---|
| Poinsettia Euphorbia pulcherrima | 9a to 11b | NC State’s plant toolbox rates it winter hardy in zones 9 to 11. UF/IFAS says it is a tropical plant that must be protected from frost and freezing weather. |
Zone ranges are NC State Extension’s Gardener Plant Toolbox, one page per plant, listed in the sources below. A range is a rating, not a promise: the sources on this page say a site, a summer or the time a bulb spent indoors can matter as much. In the next table the freeze dates are measured.
Zone by zone
When a potted poinsettia can go outside, and when it comes back in
Each date is the median across every NOAA station the zone’s ZIP codes cite, 1991–2020 normals. The middle half of those stations falls within the range shown beside it.
| Zone | Rated for the ground | Last spring freeze | First fall freeze | Set outdoors after | Bring indoors before |
|---|---|---|---|---|---|
| 3a | 0 of 1 | only 10 stations with comparable freeze dates — too few to publish a date | |||
| 3b | 0 of 1 | May 18 · middle half May 15 – May 25 | September 23 · middle half September 17 – September 26 | May 31 | September 23 |
| 4a | 0 of 1 | May 15 · middle half May 10 – May 21 | September 27 · middle half September 22 – September 30 | May 29 | September 27 |
| 4b | 0 of 1 | May 11 · middle half May 5 – May 23 | September 30 · middle half September 23 – October 3 | May 26 | September 30 |
| 5a | 0 of 1 | May 9 · middle half May 1 – May 20 | October 2 · middle half September 26 – October 7 | May 24 | October 2 |
| 5b | 0 of 1 | May 4 · middle half April 27 – May 15 | October 8 · middle half October 1 – October 14 | May 19 | October 8 |
| 6a | 0 of 1 | May 1 · middle half April 24 – May 9 | October 14 · middle half October 5 – October 20 | May 16 | October 14 |
| 6b | 0 of 1 | April 25 · middle half April 17 – May 3 | October 20 · middle half October 11 – October 24 | May 11 | October 20 |
| 7a | 0 of 1 | April 19 · middle half April 11 – April 27 | October 23 · middle half October 17 – October 28 | May 5 | October 23 |
| 7b | 0 of 1 | April 8 · middle half April 3 – April 16 | October 30 · middle half October 25 – November 3 | April 25 | October 30 |
| 8a | 0 of 1 | March 30 · middle half March 25 – April 5 | November 5 · middle half November 1 – November 10 | April 16 | November 5 |
| 8b | 0 of 1 | March 20 · middle half March 13 – March 29 | November 12 · middle half November 7 – November 18 | April 8 | November 12 |
| 9a | 1 of 1 | March 5 · middle half February 24 – March 15 | November 24 · middle half November 18 – December 2 | March 28 | November 24 |
| 9b | 1 of 1 | February 12 · middle half January 30 – February 25 | December 8 · middle half December 1 – December 17 | March 12 | December 8 |
| 10a | 1 of 1 | 107 of 190 stations here record no ordinary freeze, so there is no freeze date to count from | |||
| 10b | 1 of 1 | 70 of 79 stations here record no ordinary freeze, so there is no freeze date to count from | |||
| 11a | 1 of 1 | 34 of 34 stations here record no ordinary freeze, so there is no freeze date to count from | |||
| 11b | 1 of 1 | 12 of 12 stations here record no ordinary freeze, so there is no freeze date to count from | |||
“Rated for the ground” counts the NC State zone ranges above. The freeze dates are measured.
- Set outdoors after: UF/IFAS plants a saved poinsettia outdoors after the last frost; the date is the zone’s one-in-ten late last spring freeze from NOAA records.
- Bring indoors before: UF/IFAS says poinsettias must be protected from frost; the date is the zone’s median first fall freeze from NOAA records, and the latest a pot should stay out.
Your ZIP code
Your ZIP, your answer
Enter your ZIP code to see your USDA zone, whether poinsettias are rated to stay outdoors all year in that zone, and when a pot can go out in spring and should come back in, read from the table on this page, and the freeze dates of the NOAA station nearest you.
Your answer appears here.
Full details for any ZIP code: ZIP code zone finder.
What a poinsettia is
Iowa State University Extension calls the poinsettia the most popular flowering potted plant in the United States. Native to Mexico, it grows there as a large shrub or a small tree, and NC State Extension’s plant toolbox says it reaches 10 feet in the wild but rarely more than 2 or 3 feet in a pot.
The red, pink, white or marbled “petals” are bracts, which Iowa State describes as modified leaves. The real flowers are the small yellow-green buttons in the middle, called cyathia. University of Minnesota Extension says the plant colors up because winter days are short, and that blue or purple ones in stores have been painted.
Choosing one
Look at the middle and the bottom of the plant. Iowa State says to choose dark green leaves all the way down, bracts with no yellow or brown spots, and true flowers shedding little or no pollen. Texas A&M AgriLife’s Bill McKinley says the center buds should be tight and yellow, and that bract color makes no difference to how long the plant lasts.
Iowa State and Utah State University Extension both say to check a plant for insects before you buy, and to wrap the plant for the trip home: Iowa State says even a moment of freezing air can blacken the leaves. Make the poinsettia the last stop on your errands.
Light and placement
Bright, indirect light is the common advice. Minnesota uses a south, east or west window; Iowa State says near a sunny window but not touching the cold glass. Keep it out of drafts and away from heat: Iowa State names outside doors and heat registers, Texas A&M adds air conditioners, and UF/IFAS Gardening Solutions says hot lights dry the plant out.
UF/IFAS says that with good care modern varieties can hold their color until March, as long as they are never frozen.
Supplies
Supplies this page mentions
Each link opens an Amazon search for a plain product type the advice above names, not a product we picked. We have not tested these and do not rank them; you choose.
As an Amazon Associate I earn from qualifying purchases. It costs you nothing extra and buys no influence over this page: every fact on it is a named extension source’s. Affiliate disclosure
- Plant saucersUF/IFAS says to set a saucer under the pot and drain it when water collects, so the soil never sits soggy.
- Pebble humidity traysUF/IFAS says slightly humid air prolongs the color and suggests setting the plant on a gravel tray.
- Nitrile glovesNC State’s plant toolbox says to wear protective gloves when handling a poinsettia, because the milky sap can cause reactions in people with latex allergies.
Watering
Iowa State calls improper watering the main cause of poinsettia trouble at home. Check the soil with a finger, water when the surface is dry until water runs out of the bottom, and take the pot out of its foil sleeve to do it, because a sleeve that holds water rots the roots (Iowa State, Texas A&M).
Dropping leaves
Leaf drop is a stress signal. Iowa State lists watering mistakes first, then warm, dry air from a register and sudden temperature swings near a door. New Mexico State University Extension adds cold air on the trip home and a plant left to wilt. A few lost leaves are no cause for alarm.
After the holidays, and color next year
Iowa State says most poinsettias are meant as temporary plants and are fine to compost once they look tired. If you want to keep one, Texas A&M says it can last for years. The plan runs through the year: cut it back in late winter or spring, grow it on in summer, then give it long, completely dark nights from about the start of fall until the bracts color (Iowa State, Minnesota, NC State).
Full guide: Poinsettia Care After Christmas: Keep It and Rebloom It
Poinsettia trees
A poinsettia tree is the same plant grown on a single bare trunk with a round head of bracts on top. Texas A&M AgriLife’s producers guide says the trunk runs 2 to 3 feet, that trees need a long growing season, and that they are hard to ship. The watering and light advice on this page applies to the head as to any poinsettia.
Full guide: Poinsettia Tree Care: Keeping a Tree-Form Poinsettia
Growing it outdoors
NC State rates poinsettia hardy in USDA zones 9 to 11, and UF/IFAS plants saved ones in the Florida landscape after the last frost, in sun for most of the day. Everywhere colder, a pot can spend the summer outside and come back in before frost. The table below gives the dates for your zone.
Full guide: Growing Poinsettias Outdoors by Zone (Zones 9–11)
Sap, children and pets
The poinsettia’s reputation is worse than the plant. Iowa State describes a study of 22,793 poinsettia exposures reported to poison control centers, mostly accidental and mostly children, with no deaths and fewer than five percent needing a visit to a medical facility. Iowa State still says the plant is not meant to be eaten and should be kept away from small children and pets.
The ASPCA Animal Poison Control Center lists poinsettia as toxic to dogs, cats and horses. The ASPCA listing names the irritant sap as the toxic principle, and says the plant is irritating to the mouth and stomach, sometimes causing vomiting, but generally over-rated in toxicity.
For cats and dogs, Pet Poison Helpline rates poinsettia mildly toxic. It says eating the plant may cause drooling, licking lips, vomiting or, rarely, diarrhea, and that the milky sap can redden and itch the skin or mildly irritate the eyes. Mild does not mean harmless, and nothing here makes a poinsettia safe to chew. If a pet has eaten some and seems unwell, call your veterinarian or a pet poison hotline.
For people, the issue is the sap. NC State says it can cause reactions in people with latex allergies, so wear gloves when you prune and keep the sap out of your eyes. Our page on holiday plants and pets covers the other holiday plants.
Common mistakes
- Leaving it in the foil sleeve, where drained water collects and rots the roots (Iowa State, Texas A&M).
- Watering on a schedule instead of by touch. Iowa State checks the soil daily and waters only when the surface is dry.
- Carrying it home unwrapped in freezing weather. Iowa State says even a moment can blacken the leaves.
- A spot by a heat register, an outside door or a cold window pane (Iowa State).
- Buying a plant whose true flowers are already shedding pollen, or that has lost its lower leaves (Iowa State).
We found no Clemson or LSU AgCenter source on poinsettias that we could read. Southern advice on this page comes from UF/IFAS, Texas A&M AgriLife and NC State.
Questions
- Are poinsettias poisonous to cats and dogs?
- The ASPCA lists poinsettia as toxic to dogs, cats and horses, with an irritant sap that can upset the mouth and stomach and sometimes cause vomiting, though it calls the plant generally over-rated in toxicity. Pet Poison Helpline rates it mildly toxic to cats and dogs. Keep the plant out of reach, and if a pet seems unwell after eating some, call your veterinarian or a pet poison hotline.
- Are poinsettias poisonous to people?
- Iowa State University Extension says research has shown they are not poisonous, though they are not meant to be eaten and can upset the stomach. The milky sap can irritate skin, and NC State Extension says it can cause reactions in people with latex allergies.
- Are the red parts of a poinsettia flowers?
- No. Iowa State says the colored parts are bracts, which are modified leaves. The true flowers are the small yellow-green buttons, called cyathia, in the middle of the bracts.
- How long does a poinsettia last?
- Iowa State says a well-kept poinsettia stays attractive for several weeks, past New Year’s Day, and UF/IFAS says modern varieties can hold their color until March if they are never frozen.
Sources
Freeze dates on this page are NOAA 1991–2020 Climate Normals, for every station the ZIP codes in each zone cite. Zones are the USDA Plant Hardiness Zone Map, 2023. Growing advice is quoted from the extension publications below, each written for its own area.
- Iowa State University Extension and Outreach, Guide to Selection and Care of Poinsettias . Written for: Iowa (USDA zones 4b–6a).
- University of Minnesota Extension, Poinsettia , by Julie Weisenhorn (Reviewed 2026). Written for: Minnesota (USDA zones 3a–5a).
- UF/IFAS Gardening Solutions, Poinsettia (Accessed October 2026). Written for: Florida (USDA zones 8b–11b).
- Texas A&M AgriLife (Texas A&M Stories), Setting Your Poinsettias Up For Success , by Katharine Cook (Dec. 4, 2023). Written for: Texas (USDA zones 6b–10b).
- Texas A&M AgriLife Extension (Texas Poinsettia Producers Guide), Poinsettia Forms and Styles . Written for: Texas (written for growers) (USDA zones 6b–10b).
- NC State Extension Gardener Plant Toolbox, Euphorbia pulcherrima (poinsettia) . Written for: North Carolina (USDA zones 6b–9a).
- New Mexico State University Extension (Southwest Yard and Garden), Poinsettia leaves falling too early (December 22, 2001). Written for: New Mexico (USDA zones 5a–8b).
- Utah State University Extension, Ask an Expert — How to Have Happy, Healthy Poinsettias for the Holidays and Beyond , by Taun Beddes (December 9, 2022). Written for: Utah (USDA zones 4a, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b).
- ASPCA Animal Poison Control Center, Toxic and Non-toxic Plants: Poinsettia . Written for: Pet owners in every state (an animal emergency phone line, not an extension service).
- Pet Poison Helpline, Poinsettia . Written for: Pet owners in every state (an animal emergency phone line, not an extension service).
Published October 25, 2026 · Updated November 3, 2026
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