Lavender Propagation Methods
Among numerous aromatic herbs, lavender is deeply loved by gardening enthusiasts for its unique fragrance and elegant blue-purple flower spikes. However, many people often encounter problems such as low germination rates and crowded plants during propagation and maintenance. This article will systematically analyze the two main propagation techniques of lavender and delve into the key maintenance point of potted density.
I. Complete Guide to Seed Propagation Process
1. Environmental Control and Seed Selection Skills
The best sowing period is in April when the temperature is stable at 20-25°C, and greenhouse equipment should be used if it is below 8°C. It is recommended to choose the imported Provence variety with plump seeds, which has a germination rate of over 75%. Experiments have shown that sunning the seeds can shorten the germination period by 3-5 days.
2. Advanced Substrate Mixing Solution
On the basis of the traditional formula of garden soil + peat + river sand (5:3:2), 5% perlite can be added to enhance aeration. Before sowing, the substrate should be watered thoroughly with a carbendazim solution to effectively prevent stem blight.
3. Smart Germination New Method
In addition to warm water soaking, it is recommended to use a smart thermostat to control a 28°C environment, combined with double-layer moist gauze wrapping the seeds, which can increase the germination rate by 40%.
II. Practical Analysis of Cutting Propagation
1. Golden Rule for Choosing Stems
Select semi-woody stems, retain 3-4 pairs of leaves, and make a 45° oblique cut 0.5 cm away from the node. Using 1000ppm indolebutyric acid quick dip treatment can achieve a rooting rate of 90%.
2. Key Steps for Substrate Disinfection
Mixed substrate of river sand and coconut bran needs to be sterilized with high-temperature steam. After cutting, cover with a transparent moisture-retaining cover, ventilate for 2 hours a day, and maintain 70% air humidity.
III. Scientific Management of Potted Density
In the seedling stage, it can be densely planted with 5-8 plants per 15cm diameter pot, and it is necessary to separate the pots when the plant height exceeds 15cm. Mature plants need to ensure that each plant has a growth space of over 30cm in diameter, with a root spacing of more than 10cm.
IV. Supplementary Scheme for Division Propagation
For plants over three years old, division can be performed in early spring during pot changing. Cut the芽 root mass with a disinfected knife, retain 3-5 growing points per clump, and apply wood ash to the wound before planting.
By systematically mastering seed and cutting techniques, combined with scientific potted density management, the lavender can achieve a full pot effect. The key is to grasp the three-stage temperature control (28°C for germination, 25°C for growth, and over 5°C for overwintering), while maintaining the pH value between 6.5-7.5. Regular use of potassium dihydrogen phosphate foliar fertilizer can increase the flower spike length by 30%.