To encourage blooming in the fall, the Thanksgiving cactus should get frequent fertilization throughout the growth season. Every two weeks in the spring, summer, and early fall, apply a balanced, diluted liquid fertilizer.
Which fertilizer is ideal for Thanksgiving cacti?
Temperature & Light: The festive cacti thrive in bright shade. In the fall and winter, full sunshine is advantageous, but in the summer, intense sunlight can cause plants to seem pale and yellow. In the growing season from April to September, temperatures between 70 and 80 F are ideal for spring and summer growth. The Thanksgiving and Christmas cacti need on shorter (8 to 10 hour) days and cooler temperatures in the fall to develop their flower buds. Once the flower buds are set in the fall, do not allow the temperature to reach above 90 F. The loss of flower buds can be a result of persistently warm conditions. In the event that it gets below 50 degrees Fahrenheit, do not leave these cactus outside.
Temperature control and photoperiod (control of the duration of the day and night) control are key factors in successful flower bud formation in the fall. The plants require the following for the initiation of flower buds:
- dazzling light
- long evenings Before flower buds to set, there must be at least 14 hours per day of nonstop darkness. For a full bud set, long nights should begin around the middle of September and last for at least six weeks. Be aware that even two hours of intermittent lighting can prevent flower buds from setting. In 3 to 4 weeks, buds will often start to appear. Once the buds are set, the photoperiod has little impact on flowering.
- For optimal flower production, fall growth temperatures should be kept between 60 and 68 oF, ideally as close to 68 oF as feasible. Regardless of the length of the day, plants cultivated with night temperatures between 50 and 59 oF will produce flower buds, however growth will be slower and bud drop may happen at this temperature.
- Early in June, prune the stems to encourage branching and additional flower terminals.
- At the end of September, pinching—also known as leveling—is done to cut off any terminal phylloclades that are less than 1 cm (0.4 inch) and to roughly equalize the length of all stems. These young, immature stem segments won’t begin blossom buds until they are fully developed. A flower bud develops on the earlier, more developed stem segment following the removal of a brief phylloclade.
Fertilizer and Watering: Water the growing media until it feels completely dry to the touch. The spring and summer months can be dry and mildly underwatered for the holiday cacti. Avoid letting the soil become soggy, especially during the gloomy winter months, but also avoid letting it fully dry up. To avoid flower bud abscission, the growing medium must be kept consistently moist after bud set in the fall. In the saucer underneath the pot, never let water stand.
Use a half strength soluble fertilizer, such as a 20-10-20 or 20-20-20 with trace elements, to fertilize plants every month beginning when new growth begins in late winter or early spring and continuing through the summer. Compared to many plants, holiday cacti have a greater magnesium need. During the growing season, fertilize once a month with Epsom salts (magnesium sulfate) blended at 1 teaspoon per gallon of water, but avoid applying the fertilizer the same week. Stop fertilizing in the late summer to increase the formation of bloom buds in the fall.
The Christmas cacti flower best when kept fairly pot-bound, according to the growing medium. Repotting is best done in the spring and is only required about once every three years. These epiphytic cacti do not grow well in heavy, wet potting mixes, thus the potting medium needs to be well-drained and well-aerated. A excellent mixture can have 60–80% potting soil and 40–20% perlite. Pick a potting soil that is pH balanced and of good quality.
When it’s blooming, should I fertilize my Thanksgiving cactus?
Thanksgiving cactus is a seasonal plant that blooms in the autumn. It features long-lasting tubular flowers and is simple to grow.
Instructions
- To make the soil of the Thanksgiving cactus drain efficiently, add a lot of organic matter.
- Place the plant in the shade outside throughout the summer, but bring it inside if it gets colder than 50 degrees F.
- Place the pot in a well-lit area away from the sun.
- During the blooming season, keep uniformly moist, but water sparingly the remainder of the year, letting the soil’s top layer dry up before watering again.
- Every two weeks, fertilize with a succulent food when the plants are in flower.
- From November to March is when flowers are in bloom.
- To promote a bushier plant, properly prune in the spring.
- In the spring, grow new plants from these leaf cuttings.
- Only climate zones 10 and above are cold resistant. Grow as a houseplant in other places.
- Beware of mealy bugs, spider mites, and root rot caused by excessive watering.
How soon do I need to fertilize my Christmas cactus?
Christmas cacti generate beautiful flowers and trailing jointed stalks. These epiphytes, which are native to Brazil, are ideal houseplants. The majority of the time, cacti require little maintenance and flourish in conditions of average hydration, indirect, bright light, and well-draining soil. Monthly feedings of Christmas cacti are done during the growing season, which is typically from April to October. This will maintain your plants healthy so that they can develop buds and eventually have that completely blossomed appearance in time for Christmas.
You don’t have to fertilize your gift of cacti if you don’t want to maintain it. The plant will gradually starve to death as the soil eventually releases all of its nutrients. Any lazy cactus will liven up with fresh soil and the addition of houseplant food, but timing is crucial.
In the autumn, when the weather is cooler and the days are shorter, Christmas cacti form buds. In order to deceive the plant into producing buds, they require 12 hours of darkness. Christmas cactus may develop strong growth to maintain the blossoms if fertilized in the spring and summer. Additionally, the plant stores energy to support the development of buds. When fall hits, the plant is forced to produce magnificent hot pink to red blossoms by a harsh schedule of shorter days, cooler temperatures, less water, and no additional nourishment.
Should you fertilize a Christmas cactus that is in bloom?
Beginning when you notice fresh growth at the end of winter or the beginnings of spring, fertilize the plant once a month after it has finished blooming. Give a 20-20-20 or 10-10-10 plant food diluted in water to 50% strength when feeding a Christmas cactus.
Should I mist my cactus of thanksgiving?
The most frequent queries regarding raising a Thanksgiving cactus are addressed here. If yours isn’t addressed here, post a comment below with your query.
How fast does a Thanksgiving cactus grow?
A Thanksgiving cactus can develop quickly. They can reach their full size of 24 in just a few years with the right care.
It might be time to repot yours if it is growing extremely slowly, or you could try fertilizing it in the spring and summer.
Are Thanksgiving cactus indoor or outdoor plants?
Depending on where you live, Thanksgiving cacti can grow as either indoor or outdoor plants. In areas where the winters are frigid, they are frequently kept indoors as houseplants.
When the nighttime temperature is over 50°F in the spring and summer, they can be moved outside. In zones 9 through 11, gardeners may leave them outside all year.
Should I mist my Thanksgiving cactus?
If the air in your house is particularly dry, you should mist your Thanksgiving cactus. Humidity is crucial because they absorb moisture from the atmosphere. However, after sprinkling, don’t leave water on the leaves for too long to prevent decay.
How often should I water my Thanksgiving cactus?
Only water your Thanksgiving cactus frequently enough to maintain equally moist soil. Avoid over-drying it out to prevent shriveling or drooping leaf segments. To prevent the roots from rotting, do not allow it to become so wet that there is standing water.
How much light does a Thanksgiving cactus need?
Thanksgiving cacti require 8 to 10 hours of indirect, strong light each day, with 12 to 16 hours of total darkness in the early fall to stimulate flowering. They thrive outside in locations with dappled sunlight or partial shade.
It’s crucial to learn about Thanksgiving cactus maintenance so you can consistently enjoy the stunning, vibrant flowers. You’ll be able to raise Schlumbergera truncata for many years if you get the hang of it.
Get a copy of my eBook on winter houseplant care if you want to learn even more about how to keep your favorite indoor plants alive during the year’s coldest and darkest months. It will teach you everything you need to know to maintain their health all year long. Get your copy right away.
Why are my Thanksgiving cactus’ limp leaves?
Lack of water or much sunlight can occasionally result in wilted or weak Christmas cacti. Start by giving the wilting Christmas cactus a small amount of water if you haven’t been watering it. Every few days, continue to water carefully until the soil is barely damp.
Christmas cactus issues can also result from excessively damp soil. The Christmas cactus cannot tolerate wet roots since it is an epiphyte in its natural habitat on the ground of tropical forests, where it takes moisture and nutrients from the air. The roots of Christmas cacti can become excessively wet and floppy because to poor drainage.
Move your wilted or limp Christmas cactus to a location with more shade, especially in the afternoon, if the leaves look dried or burned.