How long to dry the roots of Cereus peruvianus cutting
As a star variety among cacti plants, Cereus peruvianus is deeply loved by horticulture enthusiasts for its brilliant flowers and unique shape. Cutting propagation is the most commonly used cultivation method for Cereus peruvianus, where the root drying stage is directly related to the survival rate of cuttings. This article will systematically analyze the key points of root drying for Cereus peruvianus cuttings, helping enthusiasts master all skills from branch processing to post-care.
One, criteria for determining the root drying time of Cereus peruvianus
1.1 Basic root drying duration range
Cereus peruvianus cuttings usually require 1-3 days for root drying, with the specific duration needing to be adjusted according to environmental humidity. In a ventilated environment with an air humidity of 50%-60%, most cuttings can complete the cut closure within 36 hours. In dry northern regions, it can be shortened to 24 hours, while in the southern plum rain season, it is recommended to extend to 72 hours.
1.2 Cut healing observation method
Observing the cut changes with the naked eye is more accurate: fresh cuts should continue to be dried when they are green, and when a translucent protective film forms on the surface and the color turns grayish-white, it indicates that the healing tissue has formed. At this point, you can gently scrape with your nail, and if no sap oozes out, you can proceed with cutting.
Two, the complete process of cutting propagation for Cereus peruvianus
2.1 Cutting preparation standards
Select 2-year-old healthy branches, cut them into 8-15cm sections with a sterilized knife, and retain 2-3 growing points per section. A flat cut at the top and a 45-degree斜切 at the base can increase the water absorption area, and make sure to remove the sticky liquid at the cut.
2.2 Substrate preparation and disinfection
It is recommended to use a mixed substrate of decomposed leaf soil: perlite: vermiculite = 5:3:2, and sterilize at 121℃ under high pressure for 30 minutes. The moisture content should be controlled to form a ball when held and scatter when dropped, with about 40% water content.
2.3 Scientific cutting method
Insert the cuttings vertically into the substrate 2-3cm deep, and fill around with coarse river sand to enhance aeration. Use the immersion pot method to replenish water, avoiding water冲击 on the cuttings. Maintain a 70% shading rate initially, and keep the temperature at 20-25℃.
Three, key points of scientific care after cutting
3.1 Water management during the rooting stage
Keep the substrate slightly moist (30% water content), and use a spray method to maintain air humidity. When new buds sprout 1cm, gradually increase light to a scattered light environment.
3.2 Root development judgment
About 15-20 days later, gently pull the cutting to feel resistance; if there is a clear sense of gripping the soil, it indicates that roots have formed. At this point, you can apply a solution of rooting hormone diluted 2000 times to promote the development of secondary roots.
3.3 Seedling transition management
When new roots reach 3cm, transplant them into a plain-fired pot with a diameter of 12cm, using the same growing soil as the original substrate. After transplanting, allow the seedlings to adapt for 7 days, gradually accepting direct sunlight.
By precisely controlling the root drying duration, standardizing the cutting process, and implementing scientific care, the survival rate of Cereus peruvianus cuttings can be increased to over 85%. Mastering key technologies such as cut healing judgment, substrate moisture control, and gradual light adjustment, even新手 can successfully cultivate robust plants.