Propagating a dog tail cactus with seeds is difficult but can easily be done using root division or cuttings. While dog tail cacti are hardy, they can become damaged by dampness or frost from harsh winter weather. It’s best to overwinter a dog tail cactus indoors with ample sunlight.
Light
Dog tail cacti grow best in full sun. Its stems usually become too thin and dull in color if grown in poor light conditions. Ample sunlight also encourages healthy, short, and sharp spines rather than softer, hair-like ones.
Soil
Growing dog tail cacti in a fast-draining and drying cactus mix is best. This will ensure your cactus won’t suffer issues from excessive moisture. If your cactus has to grow in overly wet soil, it will begin to rot. When making a soil mix from scratch, use two parts mineral, such as sand, perlite, or fine gravel, mixed with one part organic matter.
Water
Epiphytic cacti require more water than other cactus species and will need more regular moisture during summer. However, ensuring the soil or cactus mix dries out completely in between watering is crucial. You must provide your dog tail cactus with the correct water balance and dryness. If your cactus doesn’t receive enough water, it can start to produce a disproportionate amount of unhealthy aerial roots.
Temperature and Humidity
The dog tail cactus is among the hardier cacti species. It can tolerate temperatures from around 40˚F up to 90˚F. However, it can’t tolerate frost. The dog tail cactus prefers humidity over the dry heat that many other cacti thrive in. In cooler regions, the cactus is better suited to indoor growth.
Fertilizer
Once your dog tail cactus becomes root-bound and well established, it will benefit from regular diluted fertilizer feeding during growth periods. Ideally, the fertilizer is formulated specially for cacti. You may also provide a light layer of a bloom booster fertilizer through the spring and summer.
Types of Dog Tail Cacti
Strophocactus brasiliensisStrophocactus wittii Strophocactus sicariguensis
Pruning
You don’t need to prune a dog tail cactus unless you notice that its leaves have died, become damaged, or it has grown a limb so large that it may tip over the plant. Very carefully remove limbs at their branch point without cutting into the cactus’s main stem. You may use pruners or your fingers to snap off dead sections of the plant.
Propagating Dog Tail Cacti
Healthy dog tail cacti bear many stems and can grow quickly from a cut or broken-off piece. It’s best two propagate in the spring. Here are two propagation methods: To propagate with cuttings: To propagate with root division:
How to Grow Dog Tail Cacti From Seed
Although dog tail cacti can be grown from seed, it can be challenging as cacti seedlings are usually very fragile. If your cactus pollinates well after bloom, it will produce seeds from which you can propagate the plant. With the arrival of spring, plant the seeds in a pot filled with potting mix and apply a thin layer of sand. Allow the seeds to dry completely before storing them in a dry, dark location. Continue to mist the seeds through germination; once established, water normally.
Potting and Repotting Dog Tail Cacti
When repotting a dog tail cactus, ensure the soil or cactus mix is completely dry before carefully removing it. When you re-pot it, select a well-draining pot, and spread out the roots. Leave the plant dry for at least a week before initial light waterings. This will reduce the risk of any root rot occurring. Don’t over-apply cactus mix or fast-draining potting medium, as these cacti thrive in little soil.
Overwintering
It’s best to overwinter dog tail cacti indoors, particularly in an unheated garage near a window or grow lights. While cacti can withstand cold temperatures, they will suffer from wet soil caused by snow or frost. Epiphytic cacti, such as dog tail cacti, are slightly more sensitive to winter weather and low temperatures, so make indoor overwintering a priority.
How to Get Dog Tail Cacti to Bloom
The bloom time for a dog tail cactus is usually between March to July. Once in bloom, they produce large, fragrant white (or sometimes pink) flowers that resemble orchids. Dog tail cacti are nocturnal bloomers, meaning the flower opens late in the day and stays open during the night. Don’t be disappointed if your plant never blooms. Unless growing conditions are perfect, they rarely offer up any flowers.
Common Problems With Dog Tail Cacti
Problems with dog tail cacti usually arise from overwatering, under-watering, or insufficient light.
Discoloration on Stems
Discoloration on dog tail cactus stems is likely a result of poor watering practices. If your cactus is receiving too much or too little water, its stems will become pale. This may also result from frost damage, mold, or lack of sunlight. Consider moving your cactus in addition to adjusting its watering routine.
Weak Stems
If the stem of your dog tail cactus seems weak, you likely need to increase its exposure to light. The plant doesn’t require direct sunlight, but ensure it at least gets a boost of indirect light, either indoors or shaded by other plants. Dark tips may accompany weak stems.
