When can Rosemary be propagated by cutting
As an herb with both ornamental and culinary value, rosemary propagation by cutting has always been a hot topic among gardening enthusiasts. Mastering the correct cutting season and operation skills can allow you to easily enjoy the fun of multiplying one plant into many. This article will systematically analyze the golden time window and scientific operation process for rosemary cutting.
Choosing the Golden Time for Rosemary Cutting
Best Cutting Time in Spring
When the temperature is stable at 18-25°C from March to April, the plant's auxin secretion is vigorous. Cutting semi-woody branches at this time can result in new roots in 15-20 days. It is recommended to operate after consecutive sunny days and avoid high humidity during the plum rain season.
Alternative Time Window in Autumn
In September to October, the increased temperature difference between day and night will stimulate root development. When cutting in autumn, it is important to keep the substrate warm. In the northern regions, it is recommended to advance to the end of August to ensure that the new plants have enough time to lignify and overwinter.
Detailed Explanation of the Full Rosemary Cutting Process
Scientific Branch Treatment
Select the top 10-15cm healthy branches and cut diagonally at a 45-degree angle with scissors sanitized with alcohol. Keep 3-5 leaves at the top and remove all leaves at the base. After applying rooting powder to the cut, let it dry in the shade for one hour to form callus tissue, which can increase the survival rate by 20%.
Scientific Substrate Mixture Ratio
It is recommended to use a mixed substrate of珍珠岩:蛭石:泥炭土=1:1:2, which ensures both breathability and water retention. The container depth should be recommended to be 15cm or more, and it should be sterilized in advance with a carbendazim solution.
Intelligent Maintenance Management
Insert the cuttings 4-5cm deep, maintaining an 8cm spacing between plants. Initially, build a mini greenhouse to maintain 75% humidity. Start with scattered light exposure after 3 days and spray water every 3 days. Apply diluted phosphorus and potassium fertilizer (2000 times) during the root development period (15 days later).
By scientifically mastering the cutting timing and standardized operation process, the success rate of rosemary propagation can reach over 90%. It is recommended to use a thermometer and humidity gauge to monitor the environment, and to pair it with an automatic spray system for intelligent management. Collect this article's quarterly maintenance calendar to help you create a fragrant herb garden.