Apple Cactus
Apple cactus (Cereus repandus) is a popular cactus species belonging to the family Cactaceae. Sometimes referred to as Hedge Cactus, Old Man Cactus or Columnar Cactus, this slow-growing succulent is a particularly attractive ornamental plant because of its white, pink or yellow flowers which typically bloom during the summer months and its delicious edible fruit. Apple cactus can be found native in Mexico, Venezuela and parts of South America and is generally tolerant of a wide range of temperatures and moist climates. This makes it an ideal houseplant.
Apple Cactus doesn't need to be watered as much as other houseplants, so it can be planted in an area that receives less water. During the warmer months of the year, this cactus should be watered about once a week or more if exposed to very high temperatures. During the winter months, it should only be watered about every two weeks. Be sure to monitor the soil and adjust your watering schedule accordingly so that the soil is neither too soggy nor completely dry.
Apple cactus prefers indirect light, but can tolerate bright, direct sunlight if its roots are kept cool. Keep it in a location where it would get a few hours of direct sunlight in the morning, but protect it from the hot afternoon sun. You can also keep it in a bright window sill to provide plenty of light. Avoid dark corners and areas with no light as most cacti will begin to stretch or etiolate when planted in low light locations.
Apple cactus prefers temperatures between 50-95°F (10-35°C). It doesn't tolerate extreme temperatures especially in the winter months, so it should be kept away from cold drafts and windows. It won't survive temperatures below freezing.
Apple cactus prefers humid temperatures, especially during the summer months. Mist the cactus frequently or place it outside in your garden or balcony. If you have a tropical themed terrarium, the cactus would be a great addition and help maintain the humidity.
Apple cactus prefers a light, well-draining potting mix. A cactus potting mix with organic matter is ideal. The soil should dry out completely after each watering to prevent root rot.
Apple cactus should be fertilized during the growing season about every two to four weeks with a balanced liquid fertilizer. During the winter months, fertilization should be reduced to about once a month. Overfertilization can burn the plant's roots, so it is important to follow the directions on the fertilizer packaging.
Apple Cactus is not very prone to pests, but scale infestations, where white bugs or mealy bugs are present, can sometimes occur. Scale infestations are difficult to treat and can spread quickly, so if present, it is best to isolate the plant from other houseplants while treating it. To treat a scale infestation, gently remove or scrape off the bugs by hand or with a soft brush. You can also use insecticidal soap or horticultural oil to break down the waxy coating of the bugs and kill them. In more severe cases, systemic insecticides may be used.
Repotting is necessary when your cactus outgrows its current pot or when the soil becomes compacted. Apple cactus typically grows slowly so it may only need to be repotted every two to three years. Choose a pot that is only slightly larger than its current pot and use a light, well-draining potting mix in order to prevent root rot.
Prune your Apple Cactus only when necessary to keep it looking neat and healthy. Remove the occasional dead stem or damaged pad when you spot them, and the plant will look its best. Pruning also helps encourage branching and create a fuller, denser cactus.
Mulching your Apple cactus is not necessary, but it can help keep the potting mix moist and cool. Use an organic mulch, such as bark chips, to help retain moisture and discourage weeds.
Apple cactus can be easily propagated by stem or pad cuttings. To take a cutting, use clean scissors to cut a piece away from the main cactus stem. Allow the cutting to dry for a few days before planting. Plant the cutting in a well-draining potting mix and be sure to keep it in a warm location away from cold drafts. Be sure to keep the soil consistently moist until the cutting takes root, which could take up to several weeks.
Apple cactus can become top heavy with its pads, so it may need to be supported by a stake or trellis. To avoid damaging the plant, use something soft like a twist tie to attach the cactus to the stake.
Apple cactus does not require a rest period, but will benefit from a cool, dry period in the winter months. However, this does not necessarily need to be separated from its growth period as it will still continue to grow in the winter months, just at a slower rate.
Apple cactus is considered nontoxic to cats, dogs, and horses according to the ASPCA website.
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