Cactus likes high temperature and dry environment. In winter, the room temperature should be kept above 20℃ during the day and not lower than 10℃ at night. Too low temperature is easy to cause root rot, and too high temperature is easy to cause scale insect damage.
Lighting cactus needs plenty of sunshine, but it can't be exposed to strong light in summer, so it needs proper shelter. Indoor cultivation can use light to make it grow healthily.
Soil cactus is suitable for growing in sandy loam with good drainage. Artificial culture soil is often used for indoor cultivation, usually mixed with peat soil and fine sand. It can also be planted by adding fine sand to crushed pine needles and mixing the prepared culture soil.
Watering cactus needs a dry environment, and it is afraid of water accumulation in the basin. Usually, we should keep the basin soil "dry and wet". It is best to water it with dry water.
When fertilizing cactus to change the soil, a small amount of base fertilizer, such as horseshoe slices, bean cakes or sesame sauce residue, should be applied to the bottom of the basin. During the growth period, the fermented organic fertilizer liquid fertilizer should be watered once every half month (the concentration should be 20%), and the fertilizer concentration should not be too high.
Pest control in high temperature and poor ventilation environment, pests and diseases are prone to occur. The disease can be sprayed with carbendazim or thiophanate; Spraying dimethoate can kill pests. No matter what medicine is sprayed, it should be done outdoors.
Cactus can be propagated by grafting, generally by flat grafting, and the rootstock can be made of three-edged arrow or strong palm. The specific method is as follows: first, cut off the top of the rootstock, cross-cut the base of the scion, connect the two, and then tie it with a string. Two weeks later, take off the rope.
The aging of cactus begins at the bottom. When aging yellow appears, I painted Dayun 120 on the sphere several times without adding water with a brush to make the yellow fade and make the cactus rejuvenate. This is my experience. Dayun 120 is a plant growth regulator containing hormones, and high concentration is harmless to bulbs. It has less adverse reactions than other plant growth regulators.