The suitable growth temperature of cactus is 19-32 ℃, the suitable temperature in winter is 7-13 ℃, and it can bear 1-2 ℃. In high temperature summer, proper sunshade and ventilation are needed.
Cactus refers to a little shade tolerance, it is best to put it in a half shade environment. Like sunshine, we should give proper light all year round, otherwise the branches and stems will become thin, flowering less, flowering period short, and the ornamental value will be greatly reduced. Avoid direct sunlight in summer and do well in shade. In addition, cactus refers to short light plants, the daily light time should be controlled within 10 hours.
It is suitable for growing in soil rich in organic matter and well drained. In cohesive soil growth is poor, basin soil should be mixed with 20 - 30% of the river sand.
Do not like big fertilizer, to P and K fertilizer for good, every two weeks to apply thin fertilizer.
Cactus is more drought resistant, basin soil should be dry and wet during management, do not water too much, otherwise it is easy to cause root rot. Water well during the growing season. Winter low temperature dormancy period, keep basin soil dry.
Winter needs to go through a stage of freezing and dormancy, otherwise it is difficult to bloom. After freezing, you need to keep dry until you are about to bloom. During this period, you don't need to water
After entering the spring, still do not water, until the flower bud has the size of soybeans, you can start to water, which can promote the cactus to point to more flower buds, conducive to flowering.
In cactus after flowering and summer dormancy under high temperature, to control water, while preventing rain, to avoid rotten roots.
Once every two years, the basin is turned over, and the substrate can be made up of rotten leaf soil, peat soil, rice husk ash and other materials. In spring, pruning is carried out in combination with turning basin, and dense branches are thinned, and the remaining branches are shrunk. After pruning, spray the mixture of sulfur and stone to reduce the harm of pathogens in spring.
Prevention is the most important, especially the control of scale insects and stem rot. General diseases and insect pests of drugs can be mixed, can rotate the use of carbendazim, tolbutine and other drugs.
