Christmas cactus...or Thanksgiving cactus?

February 18, 2014 – 02:10 pm

Thanksgiving cactus (Photo by Katie DiCristina)

By Katie DiCristina

There are few and precious blooms around Fairbanks this time of year. Right now, you might find Schlumbergera blooming in your home or office. There are several blooming in the UAF SNRAS/AFES horticulture greenhouse.

I have long called the different species of Schlumbergera, Christmas cacti; but, as I read more about them, I have learned not all Christmas cacti are the same.

Native to rain forests of southern Brazil, Schlumbergera are epiphytic or epilithic, meaning they grow on trees or on rocks. They gather nutrients and water from accumulated vegetative debris that collects in these spaces. There are six recognized species of Schlumbergera, all of which are rare or endangered in their native range.

Schlumbergera are named in honor of Frederic Schlumberger who was well known for his collection of Cactaceae.

How to distinguish between holiday cacti
The species that we most often encounter in homes and offices and are for sale commercially are Schlumbergera truncata and Schlumbergera x buckleyi, a hybrid of S. russelliana and S. truncata. The former is considered a Thanksgiving cactus and the latter the Christmas cactus. Less common is an entirely different genus, Rhipsalidopsis gaertners and is called the Easter cactus. n the species. Floral and leaf morphology can be used to distinguish between species. Flowers of Christmas cactus are radially symmetrical or actinomorphic; whereas, Thanksgiving cacti are radially aymmentrical or zygomorphic. The stem segments of Thanksgiving cactus have two to four pointed serrations along the margins. The Christmas cactus has rounded serrations. The color of anthers differs between the species. Thanksgiving are yellow and Christmas are purple-brown.

Easter cactus

Thanksgiving cactus

Christmas cactus

Photoperiodism and flower induction
Photoperiodism is the physiological reaction that living organisms have to length of day or night. In the case of plants, certain developmental stages are triggered by the period of uninterrupted darkness they experience. Increasing night length induces flower bud production in Schlumbergera. The following conditions will help your Schlumbergera to flower:
Temperature: 60-68 day. 55-65 F night.
Light: Bright, direct light during the day.
Photoperiod: 13+ hours of uninterrupted darkness each day for eight weeks.
Pruning: Before buds form, pinch back terminal stem segments that are less than 0.4” long. Pinch back stems again in early June to stimulate branching and increase the quantity of terminal ends for future flower buds.
Basic Care
Media: Well draining, slightly acidic (pH 5.5-6.2).
Water: Water when dry to touch.
Light: Part shade (different than for flower induction time of year).
Temperature: 70-80F

Schlumbergera species:
S. bridgisii (Lem.) Loefgr
S. kautskyi (Horobin & McMillan) N.P. Taylor
S. obtusangula (K. Schum.) D.R. Hunt
S. opuntioides (Loefgr. & Dusen) D.R. Hunt


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Sounds like you will be traveling...

I suggest you have a live flower sent to their home to arrive just before you get there... something like an azalea or a Thanksgiving cactus plant, or a Christmas Cactus plant.
While there, I recommend you be very active in helping prepare meals, serve and clean up after the meals.
Offer to do things like peeling the potatoes, set the table, etc.
Since you are going to be there for 4 days, offer to run the vacuum before guests arrive, etc.
Offer to make quick trips to the grocery store as you see the need.
If there are children in the family, help entertain the children to give their parents a break

Christmas Cactus Unrooted Cuttings 'Lavender' Variety
Lawn & Patio ()
  • Easy to Grow.
  • A holiday and year round favorite.
  • Buds bloom from Thanksgiving to Christmas.
  • Three healthy unrooted cuttings are 2-4 segments each.
  • Roots can take 4 to 6 weeks to grow.

Related posts:

  1. Thanksgiving cactus Propagation
  2. Thanksgiving cactus (plant)
  3. Thanksgiving cactus Problems
  4. Thanksgiving cactus Blooms