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Key takeaways
- Teeth or scallops? Thanksgiving cactus segments have 2 to 4 sharp points along each edge. Christmas cactus segments have rounded, wavy edges.
- Flower angle: Thanksgiving cactus flowers stick out sideways. Christmas cactus flowers hang down.
- Pollen color: yellow on Thanksgiving cactus, purplish-brown on Christmas cactus.
- Many plants sold as Christmas cactus are really Thanksgiving cactus, which is why so many bloom in November.
- Care is the same for both, but a Thanksgiving cactus needs its long-night routine a few weeks earlier.
In this post10 sections
- Christmas cactus vs Thanksgiving cactus at a glance
- Clue 1: check the segment edges
- Clue 2: watch how the flowers hang
- Clue 3: look at the pollen color
- Clue 4: note when it blooms
- What about the Easter cactus?
- Bonus: why your ID changes your fall calendar
- Hybrids and mislabeled plants
- Holiday cactus supplies
- FAQ
Christmas cactus vs Thanksgiving cactus at a glance
Both plants belong to the genus Schlumbergera, and both come from the humid mountain forests of southeastern Brazil. The Thanksgiving cactus is Schlumbergera truncata. The Christmas cactus is Schlumbergera x buckleyi, a hybrid with S. truncata as one of its parents, which is why the two look so alike.
Neither has true leaves. The flat green pieces are stem segments, which botanists call phylloclades. The shape of their edges is the most reliable clue you have, according to Clemson Cooperative Extension.
| Feature | Thanksgiving cactus | Christmas cactus | Easter cactus |
|---|---|---|---|
| Botanical name | Schlumbergera truncata | Schlumbergera x buckleyi | Schlumbergera gaertneri (formerly Hatiora or Rhipsalidopsis) |
| Segment edges | 2 to 4 sharp, pointed teeth per side | Smooth, rounded scallops | Rounded, with fine bristles at the tips |
| Flower angle | Held out sideways or slightly up | Hang down from the tips | Open flat and wide |
| Flower shape | Tubular and a bit lopsided | Tubular and more even | Star-shaped |
| Pollen (anther) color | Yellow | Purplish-brown | Varies |
| Usual bloom time | Late October to November | December | Late winter to spring |
Clue 1: check the segment edges
Run a finger along the edge of one stem segment. On a Thanksgiving cactus, you will feel 2 to 4 sharp points on each side, and the tip of the segment often ends in two little hooks. People often say the segments look like crab claws, which is where the nickname crab cactus comes from.
On a Christmas cactus, the edges are soft and rounded, a gentle wave with no points. The segments also tend to be a little smaller and darker green, and the stems droop more as the plant grows.
Clue 2: watch how the flowers hang
When your plant blooms, look at the angle. Thanksgiving cactus flowers are held out roughly level with the stem or tilt slightly upward, and the petals are a bit lopsided, wider on one side than the other.
Christmas cactus flowers hang down from the stem tips, like small lanterns. They are more even in shape, with petals that flare back on all sides.
Clue 3: look at the pollen color
This is the clue most guides skip, and it is a handy tie-breaker. Peek inside an open flower at the anthers, the small tips that carry pollen. Clemson Extension notes they are yellow on Thanksgiving cactus and purplish-brown on Christmas cactus.
Clue 4: note when it blooms
Under natural day length, a Thanksgiving cactus usually flowers around Thanksgiving, roughly a month before a Christmas cactus. A Christmas cactus usually blooms in December. Both are triggered by long nights and cool temperatures in fall, so a warm, brightly lit room can push either one later.
That is why bloom time alone can fool you. Treat it as a hint and let the segment edges decide.
The third holiday cactus is easy to spot once it blooms. Easter cactus flowers open wide and flat, like stars, usually in late winter or spring. Its segments are rounded like a Christmas cactus but carry fine, brownish bristles at the tips and joints.
Easter cactus is a little fussier than the other two. It usually needs a longer cool rest in winter to set buds, and it dislikes soggy soil even more.
Bonus: why your ID changes your fall calendar
Here is the part most comparison guides leave out. Care is the same for both plants, but timing is not. Both need about 6 weeks of long nights (12 to 14 hours of darkness) or cool nights near 50 to 55°F to set buds, and a Thanksgiving cactus is ready to flower weeks sooner.
| Your plant | Start long, dark nights | Expected flowers |
|---|---|---|
| Thanksgiving cactus | Mid-September | November |
| Christmas cactus | Late September to early October | December |
| Easter cactus | Cool rest in winter, about 8 to 12 weeks | Spring |
If you only learned in October that your plant is a Thanksgiving cactus, don't worry. Give it dark, cool nights now, and it will usually still bloom, just a little later than usual. Our Christmas cactus care guide has the full step-by-step bloom routine, along with fixes for bud drop.
Hybrids and mislabeled plants
Growers have crossed these plants for well over a century, so some modern varieties show a mix of traits, such as slightly pointed edges with hanging flowers. Clemson Extension notes that most plants sold as Christmas cactus are actually Thanksgiving cactus, which growers can time more easily for holiday sales.
The 30-second holiday cactus check
Building a winter windowsill? A holiday cactus pairs well with an amaryllis grown for holiday blooms, and our cozy winter plant corner ideas show how to group them. For herbs in the same bright window, see the indoor herb garden guide.
Holiday cactus supplies
Shop the look
- Check the photos
Thanksgiving cactus live plant
$15-35
Listings often show the segments clearly, so you can check the edges before you buy.
Check price on Amazon for Thanksgiving cactus live plant -
Christmas cactus live plant
$15-35
Look for rounded segment edges in the photos if you want a true December bloomer.
Check price on Amazon for Christmas cactus live plant -
6-inch terracotta pots with drainage holes
$15-30 for a set
Holiday cacti bloom best a little snug, and clay helps the mix dry evenly.
Check price on Amazon for 6-inch terracotta pots with drainage holes -
Cactus and succulent potting mix
$8-15
Blend with a little orchid bark for the airy mix these forest plants like.
Check price on Amazon for Cactus and succulent potting mix -
Indoor min/max thermometer
$10-20
Tells you whether your bloom spot really gets cool at night.
Check price on Amazon for Indoor min/max thermometer
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Frequently asked questions
How can you tell a Christmas cactus from a Thanksgiving cactus?
Look at the edges of the flat stem segments. Thanksgiving cactus has 2 to 4 sharp, pointed teeth on each side. Christmas cactus has smooth, rounded, scalloped edges. In bloom, Thanksgiving cactus flowers stick out sideways with yellow pollen, while Christmas cactus flowers hang down with purplish-brown pollen.
Why is my Christmas cactus blooming in November?
It is most likely a Thanksgiving cactus. Many plants sold as Christmas cactus are really Thanksgiving cactus, which naturally blooms about a month earlier. Check the segment edges for pointed teeth to confirm.
Do Christmas and Thanksgiving cactus need different care?
No. Both want bright, indirect light, a fast-draining mix, watering when the top inch of soil is dry and long, cool nights in fall to set buds. The only real difference is timing: start the fall long-night routine a few weeks earlier for a Thanksgiving cactus.
What does an Easter cactus look like?
Easter cactus has rounded segments with fine bristles at the tips and wide, flat, star-shaped flowers that open in late winter or spring. The Christmas and Thanksgiving cactus both have tubular flowers.
Is a Thanksgiving cactus safe for cats?
The ASPCA lists Christmas cactus and Easter cactus as non-toxic to cats and dogs, and the Thanksgiving cactus is a close relative in the same genus. Any plant can cause mild stomach upset if a pet eats it, so keep it out of reach and call your vet if you are worried.
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