1, temperature and lighting
The suitable growth temperature of cactus is 20 ~ 26℃, and it needs 7 ~ 8 hours of long sunshine every day. When the temperature is higher than 35℃ in summer, the sunshade net is used to shade the sun, and when the temperature in the north is lower than 10℃ in winter, it is suggested to breed indoors and control the appropriate temperature. The average temperature in the south is about 10℃, which can be cultivated outdoors and is beneficial to light and photosynthesis.
Step 2 prepare the soil
To cultivate cactus, it is necessary to prepare sandy soil with good air permeability, strong drainage ability and rich humus. Garden soil, river sand, humus soil and furnace ash are evenly mixed according to the ratio of 3: 3: 4: 2 to make culture soil, which is prepared and disinfected in a cool and ventilated place. When planting, spread a layer of gravel on the bottom of the flowerpot to improve the water permeability of the soil.
3, watering frequency
Opuntia dillenii is drought-tolerant and waterlogging-intolerant. Water can be watered once every 20 days in spring, once every summer 10, once every autumn 15, and it is recommended to cut off water after watering once in winter. Pay attention to the soil in the basin when watering. If it is still wet, you can temporarily slow down and use rice washing water, which is conducive to growth.
4. Rational fertilization
Cactus doesn't need too much fertilizer, so a proper amount of decomposed organic fertilizer should be added as base fertilizer when planting, and slow-release fertilizer particles should be applied every 3 ~ 4 months when maintaining. When applying fertilizer, organic fertilizer needs to be diluted with water and must be mature fertilizer. Slow-release fertilizer particles need to avoid the roots and be buried at the edge of the pot soil to decompose naturally to prevent the roots from being burned and the yellow leaves from wilting.