How often should I water a Christmas cactus?

It depends on the season. Iowa State keeps the soil evenly moist while the plant is in bud and flower and lets it dry between waterings the rest of the year; UF/IFAS waters when the top inch is dry. Every source says never leave it standing in water.

Why are my Christmas cactus leaves turning red or purple?

Usually stress, most often too much light. Purdue says the leaves may turn a bit red with too much light, and UC Master Gardeners of Sacramento County name sunburn, overwatering and even a heavy bloom. Move it to bright light without direct sun.

Why is my Christmas cactus turning yellow?

Clemson says bright summer sun makes holiday cacti pale and yellow, and NC State says the Thanksgiving cactus turns yellow without some summer shade. Cornell’s St. Lawrence County office says yellowing with black spots can mean overwatering.

Why is my Christmas cactus limp?

Illinois Extension says limp, wrinkled segments come from too much or too little water, most often too much, which kills the roots. Minnesota says if it is wilted while the soil is wet, let it dry out and check that the pot drains.

When should I repot a Christmas cactus?

Rarely, and in spring. Minnesota and Clemson say about every three years, because the plants flower best a little pot-bound; Iowa State waits until the plant has completely outgrown its pot. Wisconsin refreshes the old mix every 4 to 5 years.

What fertilizer does a Christmas cactus need?

Minnesota uses a balanced houseplant fertilizer at half strength monthly from June through August, then a low-nitrogen, high-phosphorus and potassium one in fall. Clemson stops feeding in late summer and adds Epsom salts monthly in the growing season.

Can a Christmas cactus live outside?

In summer, in part shade, anywhere: Minnesota, Wisconsin and Purdue all put it outdoors. Year round, NC State lists the genus for zones 9 to 11, and UF/IFAS grows it outdoors in warm parts of Florida if it is protected from freezing.

Plants · Holiday plants

Christmas cactus care: light, water, leaf color, repotting and the zones where it lives outdoors

Christmas cactus (Schlumbergera) is grown indoors for the holidays across most of the US. By the zone ranges below, at least one of the holiday cacti on this page is rated to stay outdoors all year in 9a–12b, and a pot can summer outside almost anywhere. 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 October 30, 2026 · Cite this page

The three cacti

Where each holiday cactus is rated to stay outdoors

Cactus	Rated zones	Notes
Holiday cactus (the genus) Schlumbergera	9a to 11b	NC State’s page for the whole genus. UF/IFAS says Christmas cactus can be grown outdoors in the warmer areas of Florida if it is protected from freezing.
Thanksgiving cactus Schlumbergera truncata	10a to 12b	NC State says it needs some shade in summer or the stems turn yellow. Most plants sold as Christmas cactus are this one, Iowa State says.
Christmas cactus Schlumbergera × buckleyi	10a to 12b	NC State says it is used mainly as an indoor plant, and that full sun can bleach the stems.

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 plant spent indoors can matter as much. In the next table the freeze dates are measured.

Zone by zone

When a potted holiday cactus 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 to stay out	Last spring freeze	First fall freeze	Set outdoors after	Bring indoors before
3a	0 of 3	only 10 stations with comparable freeze dates — too few to publish a date
3b	0 of 3	May 18 · middle half May 15 – May 25	September 23 · middle half September 17 – September 26	May 31	September 23
4a	0 of 3	May 15 · middle half May 10 – May 21	September 27 · middle half September 22 – September 30	May 29	September 27
4b	0 of 3	May 11 · middle half May 5 – May 23	September 30 · middle half September 23 – October 3	May 26	September 30
5a	0 of 3	May 9 · middle half May 1 – May 20	October 2 · middle half September 26 – October 7	May 24	October 2
5b	0 of 3	May 4 · middle half April 27 – May 15	October 8 · middle half October 1 – October 14	May 19	October 8
6a	0 of 3	May 1 · middle half April 24 – May 9	October 14 · middle half October 5 – October 20	May 16	October 14
6b	0 of 3	April 25 · middle half April 17 – May 3	October 20 · middle half October 11 – October 24	May 11	October 20
7a	0 of 3	April 19 · middle half April 11 – April 27	October 23 · middle half October 17 – October 28	May 5	October 23
7b	0 of 3	April 8 · middle half April 3 – April 16	October 30 · middle half October 25 – November 3	April 25	October 30
8a	0 of 3	March 30 · middle half March 25 – April 5	November 5 · middle half November 1 – November 10	April 16	November 5
8b	0 of 3	March 20 · middle half March 13 – March 29	November 12 · middle half November 7 – November 18	April 8	November 12
9a	1 of 3	March 5 · middle half February 24 – March 15	November 24 · middle half November 18 – December 2	March 28	November 24
9b	1 of 3	February 12 · middle half January 30 – February 25	December 8 · middle half December 1 – December 17	March 12	December 8
10a	3 of 3	107 of 190 stations here record no ordinary freeze, so there is no freeze date to count from
10b	3 of 3	70 of 79 stations here record no ordinary freeze, so there is no freeze date to count from
11a	3 of 3	34 of 34 stations here record no ordinary freeze, so there is no freeze date to count from
11b	3 of 3	12 of 12 stations here record no ordinary freeze, so there is no freeze date to count from

“Rated to stay out” counts the NC State zone ranges above. The freeze dates are measured.

Set outdoors after: Wisconsin puts holiday cacti outdoors during the frost-free growing period; the date is the zone’s one-in-ten late last spring freeze from NOAA records.
Bring indoors before: Minnesota leaves them outdoors in a protected spot until just before frost danger; 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, which holiday cacti 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.

This box needs JavaScript to answer on the page. Without it, the button opens the ZIP code zone finder; your zone’s row is in the table on this page.

Your answer appears here.

Full details for any ZIP code: ZIP code zone finder.

Which holiday cactus you have

Three plants are sold under holiday names. Look at the edges of the flat stem segments: Clemson Extension says the Thanksgiving cactus has 2 to 4 saw-toothed points on each, while the Christmas cactus has rounded edges. Iowa State Extension says most plants sold as Christmas cactus are really Thanksgiving cactus or hybrids. The Easter cactus flowers in spring. Care is the same for the two fall bloomers, UGA’s Paulding County office says.

Full guide: Christmas vs Thanksgiving Cactus: How to Tell Them Apart

Colors and types

Clemson lists flowers in red, rose, purple, lavender, peach, orange, cream and white. University of Wisconsin–Madison Extension says the wild plants run from pale to deep pink and sometimes red, and that well over a hundred named cultivars and hybrids now range from almost pure white through pink and purple to deep red, many of them bicolored, with a few in yellow or gold. UC Master Gardeners of Sacramento County say breeders are still working on yellow varieties.

Iowa State says the hybrid cultivars also differ in branching, growth rate, segment shape, bloom time and habit, which can be trailing, half-trailing or upright, and that some look more like one parent than the other. Clemson says the hanging stems make the fall bloomers a good choice for a hanging basket.

All of them are true cacti from the mountain forests of southeastern Brazil, where they grow on tree branches and rocks rather than in desert sand, Wisconsin and NC State Extension say. That is why the care below looks so unlike a desert cactus’s. They have no true leaves: Clemson says the flat green segments, botanically phylloclades, do the work of leaves. This page calls them segments, and says leaves where a source does.

Light, and too much sun

UF/IFAS grows a Christmas cactus in bright, indirect light, within six feet of a south-, east- or west-facing window. NC State says the genus does not tolerate direct sun. Purdue Extension says it can adapt to low light but flowers more on a plant that gets more light, and Clemson says full sun helps in fall and winter while bright summer sun makes plants pale and yellow.

Signs of too much sun, by source: Minnesota Extension names pale green branches, drought and sunburn; Purdue says the leaves may start to turn a bit red, and that too much direct sun can burn them or leave them limp; NC State says full sun can bleach the stems of Christmas cactus and scorch those of Thanksgiving cactus.

Soil, pots and watering

Drainage decides whether these plants live. Minnesota says root rot from overly wet soil is one of the most common causes of death and that the pot needs enough holes for water to drain easily. Its mix is one part sterile potting soil, two parts peat moss and one part sharp sand or perlite. Clemson and Illinois Extension both use 60 to 80 percent potting soil with 40 to 20 percent perlite, and Purdue suggests a packaged mix for succulents or two parts potting soil to one part clean sand or vermiculite.

How much to water depends on the time of year. Iowa State keeps the soil evenly moist while the plant is budding and flowering, then lets it dry completely between waterings when it is not in flower. Clemson waters when the mix is dry to the touch and says the plants tolerate slightly dry conditions in spring and summer, but should be kept evenly moist once buds have set in fall. UF/IFAS waters when the top inch feels dry; Purdue when the top inch or so is dry. Minnesota waters in the sink, and every source says never leave the pot standing in water.

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

Cactus and succulent potting mixPurdue suggests a packaged potting mix for succulents, and NC State plants the Thanksgiving cactus in a well-drained cactus or succulent mix; Minnesota, Clemson and Illinois all warn that heavy, wet soil kills the roots.
PerliteClemson and Illinois mix potting soil with perlite, and Minnesota’s mix is one part potting soil, two parts peat moss and one part sharp sand or perlite.
Pots with drainage holesMinnesota says the container needs enough holes for water to drain easily, and Clemson never lets water stand in the saucer.
Low-nitrogen bloom fertilizerMinnesota switches to a low-nitrogen, high-phosphorus and potassium fertilizer in fall, while the buds form.

Fertilizer

Feed in the growing season, and stop before the buds. Minnesota feeds monthly from June through August with a balanced houseplant fertilizer at half strength, then switches in fall, while buds form, to a fertilizer low in nitrogen and high in phosphorus and potassium. Clemson feeds monthly at half strength from the time new growth starts in late winter or early spring through summer, and stops in late summer for more flower buds in fall. UF/IFAS feeds every one to two months from April to September.

Clemson adds that holiday cacti need more magnesium than many plants, and feeds Epsom salts (magnesium sulfate) at 1 teaspoon per gallon of water once a month in the growing season, never in the same week as the regular fertilizer. Purdue says the plant does not particularly need feeding while it blooms.

Repotting

Not often. Minnesota and Clemson both say the plants flower best a little pot-bound and need repotting only about every three years; Clemson and Iowa State repot in spring or early summer, when the plant is not in bloom. Iowa State repots only when the plant has completely outgrown its container. Purdue says a plant that dries out or wilts often may be ready for a slightly larger pot, and UF/IFAS warns against a pot that is too large.

Wisconsin is the one source that asks for more: repot at least every 4 to 5 years, remove most of the old soil and look at the roots, because peat-based mix breaks down over the years and can end up suffocating them. After repotting it cuts back on watering for a month or so while new roots grow, and stakes a large plant until the roots hold it firm.

Getting it to bloom

Buds form in fall when the nights are long and cool. NC State asks for at least 13 hours of unbroken darkness each night from mid-September to mid-November, and says a plant that will not flower is usually getting lamp light at night. Purdue starts mid-October. Once buds show, keep conditions steady: Minnesota, Clemson and Iowa State all say a sudden change, a move or dry soil can make the buds drop.

Full guide: How to Get a Christmas Cactus to Bloom, and Keep the Buds

Red, purple or yellow segments

Red or purple. Purdue says the leaves may start to turn a bit red with too much light. UC Master Gardeners of Sacramento County call red leaves a sign of stress: a heavy bloom can be the cause, and so can sunburn or overwatering. Cornell Cooperative Extension of St. Lawrence County says bronze-red leaves mean too much sun, which will not hurt the plant in the long term but uses energy it could spend on flowers. The fix every one of them points to is bright light without direct sun.

Yellow or pale. Clemson says bright summer sun makes plants look pale and yellow, and NC State says the Thanksgiving cactus needs some shade in summer or its stems turn yellow. Cornell’s St. Lawrence County office says yellowing leaves or black spots can mean overwatering, and takes the plant out to trim off rotted roots and repot it in fresh soil.

Limp, wrinkled or rotting: root rot

Illinois Extension says wilted, shriveled, wrinkled or dull gray-green segments can come from too little water or too much, and that overwatering is the most common culprit: the roots die and can no longer take up water. Minnesota says a plant that looks wilted while the soil is wet has rotting roots, and to let it dry out and make sure the pot drains. Its list of rots includes fungal root and stem rot, in which the segments turn gray-green, the stems rot at the soil line and the roots are dark and mushy.

Wisconsin says a plant that sags and does not grow while the mix is moist should be checked for healthy roots, and that a plant whose roots are gone is hard to save: clean the roots back to healthy tissue, cut the stems back hard, let the cut roots air-dry for a few days, repot in fresh mix and water sparingly. It also says to take cuttings at the same time, in case the old plant does not recover.

Woody stems at the base

A brown, corky or woody base is usually age, not disease. Wisconsin says the lower stems thicken and turn woody as the plant grows, to carry the weight of the younger stems and the flowers. Minnesota lists a brown, corky base as normal aging and says no action is needed once you have checked it is not scale insects. If an old plant starts dropping whole branches because it is too heavy to hold them, Minnesota prunes back some of the larger ones and moves it to a slightly larger pot.

Pruning, and new plants from cuttings

Minnesota prunes after flowering, cutting where two segments join, and the plant branches there; UF/IFAS says not to prune beyond mid-summer. The pieces root easily: Iowa State lets a cutting of 2 to 5 segments callus overnight, sets it about an inch deep in perlite or coarse sand, and expects roots in 6 to 8 weeks.

Full guide: Christmas Cactus Propagation: Rooting Cuttings Step by Step

Outdoors in summer, and by zone

In most of the US the pot can spend summer outside. Minnesota puts it in part shade, 3 to 6 hours of sun a day, and says filtered light under a tree is ideal. Wisconsin hangs pots in a shade tree or sets them on a shaded porch, but not in the deep shade under large mature trees, and keeps them off the ground because slugs and snails love them. UC Master Gardeners of Sacramento County put them on the north side of a fence or building.

When it comes back in is where the sources differ. Minnesota and UGA’s Paulding County office leave the plant out until just before frost or freezing weather, because the short days and cool nights start the buds. Illinois and Clemson bring it in sooner, once fall nights turn cool, which in most places is weeks before the first freeze. The “Bring indoors before” date in the table above is the latest of these, not the safest. Before it comes in, Minnesota checks for pests, removes dead pieces and fallen leaves, and makes sure the pot drains, and Purdue eases it indoors over several days.

Year round outdoors, NC State’s plant toolbox lists the genus for zones 9 to 11 and the Thanksgiving and Christmas cactus each for zones 10 to 12, and UF/IFAS says Christmas cactus can be grown outdoors in the warmer parts of Florida if it is protected from freezing. Those ratings are for a plant that never freezes; none of the sources plants these cacti in open ground, and Clemson grows them as houseplants.

Pests, and pets

Iowa State says holiday cacti rarely suffer from pests or diseases. The ones the sources name are mealybugs, scale, spider mites and aphids (NC State, Clemson), and fungus gnats where the soil stays wet (Minnesota, Illinois). Iowa State says small brown bumps with a sticky residue are usually scale, and that small infestations can be scraped off or dabbed with a cotton swab dipped in rubbing alcohol. NC State says gray mold can follow high humidity with poor air circulation.

NC State’s plant toolbox says the Christmas cactus is non-toxic and can be safely used in homes with pets or children. Our page on holiday plants and pets has what Penn State and the ASPCA say, beside every other plant of the season.

Common mistakes

Wet, heavy soil and a pot that does not drain. Minnesota calls root rot one of the most common causes of death, and Illinois says overwatering is the usual cause of limp, wrinkled segments.
Treating it like a desert cactus. Iowa State says holiday cacti should not stay dry, and keeps the soil evenly moist while the plant is in bud and flower.
Full summer sun. Purdue, Clemson and NC State all say it reddens, yellows, bleaches or burns the segments.
A pot that is too big, or repotting every year. Minnesota, Clemson and UF/IFAS all say the plants flower best a little pot-bound.
Feeding into fall with an ordinary fertilizer. Clemson stops in late summer, and Minnesota switches to a low-nitrogen fertilizer while buds form.
Leaving it out too late. Illinois and Clemson bring it in once fall nights turn cool, well before a freeze.

We found no Texas A&M or LSU AgCenter source for holiday cacti that we could read. Southern advice on this page comes from Clemson, UF/IFAS, UGA’s Paulding County office and NC State.

Questions

How often should I water a Christmas cactus?: It depends on the season. Iowa State keeps the soil evenly moist while the plant is in bud and flower and lets it dry between waterings the rest of the year; UF/IFAS waters when the top inch is dry. Every source says never leave it standing in water.
Why are my Christmas cactus leaves turning red or purple?: Usually stress, most often too much light. Purdue says the leaves may turn a bit red with too much light, and UC Master Gardeners of Sacramento County name sunburn, overwatering and even a heavy bloom. Move it to bright light without direct sun.
Why is my Christmas cactus turning yellow?: Clemson says bright summer sun makes holiday cacti pale and yellow, and NC State says the Thanksgiving cactus turns yellow without some summer shade. Cornell’s St. Lawrence County office says yellowing with black spots can mean overwatering.
Why is my Christmas cactus limp?: Illinois Extension says limp, wrinkled segments come from too much or too little water, most often too much, which kills the roots. Minnesota says if it is wilted while the soil is wet, let it dry out and check that the pot drains.
When should I repot a Christmas cactus?: Rarely, and in spring. Minnesota and Clemson say about every three years, because the plants flower best a little pot-bound; Iowa State waits until the plant has completely outgrown its pot. Wisconsin refreshes the old mix every 4 to 5 years.
What fertilizer does a Christmas cactus need?: Minnesota uses a balanced houseplant fertilizer at half strength monthly from June through August, then a low-nitrogen, high-phosphorus and potassium one in fall. Clemson stops feeding in late summer and adds Epsom salts monthly in the growing season.
Can a Christmas cactus live outside?: In summer, in part shade, anywhere: Minnesota, Wisconsin and Purdue all put it outdoors. Year round, NC State lists the genus for zones 9 to 11, and UF/IFAS grows it outdoors in warm parts of Florida if it is protected from freezing.

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.

University of Minnesota Extension, Holiday cacti (Reviewed 2026). Written for: Minnesota (USDA zones 3a–5a).
Iowa State University Extension and Outreach, All About Holiday Cacti , by Richard Jauron and Aaron Steil (Last reviewed December 2025). Written for: Iowa (USDA zones 4b–6a).
Clemson Cooperative Extension, Home & Garden Information Center, Thanksgiving & Christmas Cacti (HGIC 1554) , by Joey Williamson (Updated Nov 29, 2018). Written for: South Carolina (USDA zones 8a–9b).
University of Wisconsin–Madison Extension, Holiday Cactus , by Dan Mahr; last update Bruce Spangenberg (Last Update 2025). Written for: Wisconsin (USDA zones 4a–6a).
University of Illinois Extension, How to identify and care for holiday cacti and get them to rebloom , by Ken Johnson (December 9, 2022). Written for: Illinois (USDA zones 5a–7a).
Purdue Extension, Indiana Yard and Garden, Holiday Cactus FAQs , by Rosie Lerner (Page last modified December 20, 2019). Written for: Indiana (USDA zones 5b–7a).
Purdue Extension, Indiana Yard and Garden, Getting Christmas Cactus to Rebloom (Page last modified January 11, 2018). Written for: Indiana (USDA zones 5b–7a).
UF/IFAS Gardening Solutions, Christmas Cactus (Accessed October 2026). Written for: Florida (USDA zones 8b–11b).
UGA Cooperative Extension, Paulding County, Christmas or Thanksgiving Cactus? , by Rachel Dutton (December 19, 2022). Written for: Paulding County, Georgia (USDA zone 8a).
UC Master Gardeners of Sacramento County (University of California), Christmas cactus , by Jan Fetler (November 8, 2022). Written for: Sacramento County, California (USDA zone 9b).
Cornell Cooperative Extension of St. Lawrence County, Timing a gorgeous Christmas cactus bloom , by Juli Pomainville, Master Gardener Volunteer (September 21, 2023). Written for: St. Lawrence County, New York (USDA zones 4a–5a).
NC State Extension Gardener Plant Toolbox, Schlumbergera (holiday cactus) . Written for: North Carolina (USDA zones 6b–9a).
NC State Extension Gardener Plant Toolbox, Schlumbergera truncata (Thanksgiving cactus) . Written for: North Carolina (USDA zones 6b–9a).
NC State Extension Gardener Plant Toolbox, Schlumbergera × buckleyi (Christmas cactus) . Written for: North Carolina (USDA zones 6b–9a).

How we write our guides

Published October 25, 2026 · Updated October 30, 2026

How to cite this page

Copy a citation below. The accessed date is today's, filled in by your browser; if it shows [date], put in the day you read the page. Check the format against the style guide you are using.

APA

USGrowersGuide.com. (2026, October 30). Christmas cactus care: light, water, leaf color, repotting and the zones where it lives outdoors. Retrieved [date], from https://usgrowersguide.com/plants/christmas-cactus

MLA

“Christmas cactus care: light, water, leaf color, repotting and the zones where it lives outdoors.” USGrowersGuide.com, 30 Oct. 2026, usgrowersguide.com/plants/christmas-cactus. Accessed [date].

Seasonal jobs for this plant

Poinsettia care: light, water, pets, and the zones where it grows outside — Light and water through the holidays, what the sources say about pets, and when a pot goes out and comes in for your zone.
Amaryllis care indoors, reblooming, and the zones where it lives outside — Potting the bulb, keeping the leaves growing, and when the pot goes out and comes back in.
Paperwhites: forcing the bulbs indoors, and the zones where they grow outside — Pebbles or soil, the water line, the cool start, and where they can go in the ground.
Christmas tree care: keeping a cut tree fresh, and planting a living tree by zone — The fresh cut, the stand, plain water, and which living tree suits your zone.
Holiday plants and pets: what the sources say about each one — Plant by plant, what Penn State, Missouri, UF/IFAS, NDSU, Oregon State and NC State say about cats and dogs.
All plant guides — herbs, flowers, shrubs, trees and holiday plants
ZIP code zone finder — your exact USDA zone, and your nearest NOAA station’s freeze dates
How to Protect Plants from Frost: Covers, Timing, Temps — covering tender plants on a frosty night