Cereus Cactus. Light: The Cereus cactus loves bright light, and it thrives under full sun and partial shade. Water: This cactus needs thorough watering during its active growth stage, although you need to let the soil dry out in between waterings. In the winter, minimal watering is needed. Temperatures: This cactus likes it warm.
In a mixed arrangement within the same basket, group plants with similar care needs. But do not overcrowd plants; note the species' mature sizes. Water regularly, keeping in mind that potted plants tend to dry out more quickly than plants in the ground, but avoid overwatering your hanging baskets. Fertilize as needed, following the plant
Water your cactus when the soil is dry, about once a week, and use a low-nitrogen fertilizer about once a month. Avoid over-watering and touching the spines as much as possible. If you notice any pests, use an insecticide to get rid of them. Lastly, rotate the pot every few weeks so the cactus grows evenly.
Once separated, stick the bottom of the leaves back into a small cup or pot of soil making sure at least half of the leaf is in the dirt. Lightly mist the leaves. Place plastic bags over the cuttings to keep in the moisture. Wait to water the leaves until roots begin to sprout in a few weeks and then repot.

The blue myrtle cactus is fast-growing, getting to a mature size of 16 feet when grown outdoors. Its stems are (unsurprisingly) blue-green to blue-gray in color with anywhere from five to eight defined ribs. This species branches when it reaches maturity, adding a bit of depth and uniqueness to its appearance.

Choose a spiderette and place it in a pot of soil near the mother plant. Keep this well watered and once it roots, you can cut it from the mother plant. Alternatively, you can cut off one of the plantlets, place it in a pot of soil, and water generously. Place the pot in a ventilated plastic bag and put this in a bright location.
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how to take care of cactus indoors