This guide covers the five traditional Christmas plants: poinsettia, Christmas cactus, amaryllis, Norfolk Island pine, and rosemary topiary. Each has a real best use case — and a real catch (pet toxicity, cold sensitivity, or short bloom window) worth knowing before you buy. This guide covers what each one actually is, how long it lasts, what to do with it after Christmas, and which ones are safe around pets.
At a glance
| Plant | Bloom period | Pet-safe? | Keeps past January? |
|---|---|---|---|
| Poinsettia | Bracts fade around March–April (Clemson) | Toxic (ASPCA) | Rarely |
| Christmas cactus | December to February (NC State) | Non-toxic | Yes — can live over 100 years (UMN) |
| Amaryllis | 3–4 weeks (NC State) | Highly toxic | Yes (re-blooms annually) |
| Norfolk Island pine | (foliage, not flowering) | Non-toxic | Yes — years |
| Rosemary topiary | (foliage, not flowering) | Non-toxic (edible) | Rarely indoors |
1. Poinsettia (Euphorbia pulcherrima)
The classic Christmas plant. The big colorful "petals" most people call flowers are actually modified leaves called bracts — the real flowers are the tiny yellow buds in the center. Poinsettia bracts color up in response to short days, which is why they appear only in late autumn: Clemson Extension's reblooming schedule calls for 14 continuous hours of darkness each night for eight to 10 weeks, starting the first week of October.
Pet safety: Long-standing myth that poinsettias are deadly to pets. The ASPCA lists poinsettia as toxic to cats and dogs and describes the signs as "irritating to the mouth and stomach, sometimes causing vomiting, but generally over-rated in toxicity." Still keep it out of reach, and call your veterinarian if a pet eats some.
How to keep it alive: Bright indirect light, water when the soil surface feels dry to a light touch (UMN Extension), and no cold drafts: UMN says poinsettias suffer damage below 50°F, and Clemson notes that chilling below 50°F can cause premature leaf drop. Getting one to re-bloom next year is technically possible but requires 14 continuous hours of darkness every night for eight to 10 weeks from the first week of October, per Clemson.
Buying tip: Poinsettias sold outdoors in cold parking lots have already been damaged. Look for one stored indoors with bracts that look firm, not wilted. Cover it with a paper bag when carrying it to the car in cold weather.
2. Christmas Cactus (Schlumbergera × buckleyi)
It blooms with showy pink, red, or white flowers from December to February (NC State), can live over 100 years with minimal care (UMN Extension), and is classified as non-toxic to cats and dogs by the ASPCA.
Pet safety: Non-toxic to cats and dogs per the ASPCA entry linked above.
How to keep it alive: Bright indirect light, soil kept moist but not overly wet from spring to summer, and high humidity, per NC State. To re-bloom next year, NC State advises night temperatures of 55 to 65°F and at least 13 hours of uninterrupted darkness every night starting in mid-September, with less water as the buds develop. An unused room with the door closed is one way to provide that darkness.
The botanical correction: Per Iowa State Extension, most plants sold as "Christmas cactus" are actually Thanksgiving cactus (Schlumbergera truncata) or hybrids. True Christmas cactus (S. × buckleyi) has rounded leaf segments; S. truncata has pointed claw-like segments. Same care, slightly different bloom timing.
3. Amaryllis (Hippeastrum cultivars)
A massive trumpet-shaped flower that emerges from a large bulb. Often sold as a bulb kit in November to bloom for Christmas — UMN Extension says flowers usually develop in about 4 to 6 weeks from dormant bulbs, so plant accordingly.
Pet safety: HIGHLY TOXIC to cats and dogs, per the ASPCA. Contains lycorine and other alkaloids; the ASPCA lists vomiting, depression, diarrhea, abdominal pain, drooling, loss of appetite, and tremors. NC State Extension adds that the bulbs are the most poisonous part, and that large ingestions can cause convulsions, low blood pressure, tremors, and heart arrhythmias. Keep entirely out of pet reach — high shelf, closed room, or skip this plant if you have pets that explore.
How to bloom it: Plant the bulb in well-draining potting mix with one-third to one-half of the bulb left visible (UMN). Water sparingly until growth appears, then water regularly. Bright indirect light. Bloom appears about 4 to 6 weeks from planting, per UMN. NC State says each stalk may produce two to six flowers, and the blooms last three to four weeks.
After blooming: Cut the flower stalk, keep leaves growing, and fertilize. In late summer, stop watering and let leaves die back. NC State advises resting the bulb in a cool (50 to 55°F), semi-dark spot for 8 to 10 weeks of dormancy, then re-potting. UMN notes that amaryllis bulbs have been known to bloom for up to 75 years.
4. Norfolk Island Pine (Araucaria heterophylla)
Often sold as a "living Christmas tree." It's a conifer endemic to Norfolk Island in the Pacific Ocean, per NC State — NOT a true pine and NOT cold-hardy.
Pet safety: Non-toxic per the ASPCA.
How to keep it alive: Bright light (more than most houseplants). NC State advises watering regularly from spring to autumn without letting the soil get too wet, then watering sparingly and misting in heated rooms in winter. Dry winter air is hard on it, and NC State notes that indoor plants tolerate very low light for 2–3 years but may then drop leaves and lose lower branches. A humidifier nearby helps it through winter.
Long-term: With good care, Norfolk Island pines live for many years indoors, and NC State says they can reach 9 feet tall indoors. NC State lists them as hardy outdoors only in USDA zones 9 through 11.
5. Rosemary Topiary (Salvia rosmarinus)
The cone-shaped rosemary "Christmas tree" sold in grocery stores in December. It's a culinary rosemary plant pruned into a conical shape — same species you'd grow for cooking.
Pet safety: Non-toxic and edible. Per the ASPCA, rosemary is non-toxic to cats and dogs.
How to keep it alive (the hard part): Rosemary is a Mediterranean shrub that hates indoor conditions. It needs full direct sun (south-facing window minimum), dry-leaning soil between waterings, and low humidity. NC State notes that rosemary can be difficult to overwinter indoors and that overwatering is the common cause of decline or death; typical indoor conditions are too dim, too humid, and the soil stays too wet. Move it outside in spring.
Buying tip: Use it for cooking immediately. The cone-trained shape doesn't last anyway, and the leaves are perfectly culinary-grade rosemary.
Best picks if you have to choose one
- For a pet household with no time: Christmas cactus (non-toxic, can live over 100 years per UMN, blooms every winter)
- For dramatic bloom: Amaryllis bulb kit (massive flowers, very Instagram-worthy)
- For traditional look: Poinsettia (but accept it as a seasonal display, not a long-term plant)
- For "living Christmas tree" with year-round presence: Norfolk Island pine
- For utility: Rosemary topiary (just cook with it)
After Christmas
What to actually do with each plant in January:
- Poinsettia: Compost or attempt Clemson's 14-hour-darkness re-blooming protocol described above.
- Christmas cactus: Continue normal care. UMN says holiday cacti can live over 100 years, and it will bloom again each winter given short days and cool nights.
- Amaryllis: Cut the spent flower stalk, keep leaves growing, follow the dormancy protocol above.
- Norfolk Island pine: Treat as a permanent houseplant. It does not need to be discarded.
- Rosemary topiary: Use up in cooking before it dies indoors, or move outside in spring.
A note on Christmas trees
If you want to know whether you can plant your cut Christmas tree in the yard after the holidays, see the separate guide: Can you replant a Christmas tree?.