How to Make Old Jasmine Branches Sprout
Jasmine, as an aromatic evergreen shrub, the sprouting ability of its lignified old branches directly affects the blooming quantity. Many jasmine enthusiasts find that it is difficult for new buds to sprout in plants that have been cultivated for more than three years, which not only affects the aesthetic appearance of the plant but also leads to a significant reduction in blooming quantity. Mastering scientific methods for caring for old branches can bring new vitality to your jasmine.
Ⅰ. Three Key Elements to Activate Sprouting in Old Branches
1. Synergistic Management of Water and Fertilizer
Old jasmine branches require maintaining soil moisture at 60%-70% during the spring and autumn growing seasons, and watering thoroughly in the morning and evening during the summer. It is recommended to follow the principle of "frequent application of thin fertilizer," alternating monthly between diluted soybean cake fertilizer (high in nitrogen) and monopotassium phosphate solution (flower-promoting fertilizer), with soil loosening after fertilization to aid in absorption (S-Y) distribution.
2. Light and Temperature Control
Ensure at least 6 hours of direct sunlight daily, and maintain an overwintering temperature of 10-15°C for best results. Experiments show that under a temperature of 25-30°C combined with 70% air humidity, the sprouting speed of old branches can increase by 40%. In northern regions, placing陶粒 (ceramic beads) water trays at the bottom of the flowerpot can increase local humidity.
3. Scientific Pruning to Promote Buds
How to Make Old Jasmine Branches Sprout
Use the "reduction pruning method," making a 45-degree diagonal cut 1cm above the bud point. Retain 3-5 nodes at the base of the main stem, and apply wood ash to the cut to prevent infection. After pruning,喷施 (apply) gibberellin (at a concentration of 50ppm) can activate dormant buds.
Ⅱ. Guide to Systematic Pruning of Old Branches
1. Best Pruning Time
In the Yangtze River Valley, it is recommended to prune between March 15 and April 10, when new buds are active but leaves have not yet unfolded. In the northern regions, pruning can be postponed until after Qingming (Tomb Sweeping Day), when temperatures are consistently above 15°C. Avoid pruning during the rainy season to prevent wound infections.
2.分级修剪方案 (分级修剪方案)
Main Branch (Primary Branch): Retain 15-20cm in lengthSecondary Branch (Side Branch): Retain 2-3 bud points per branch
Tertiary Branch (Weak Branch): Cut all from the base
3. Post-Pruning Care Tips
Avoid fertilizing within 7 days after pruning, and start top-dressing when new buds reach 5cm. It is recommended to use chelated iron fertilizer to prevent yellow leaf disease, combined with brassinolide to enhance stress resistance. Maintain good ventilation and prevent diseases and pests such as scale insects.
Through systematic care, old branches over two years old usually sprout new buds 20-30 days after pruning. If some branches do not sprout, a ring剥法 (ring stripping method) can be used 0.5cm wide above the bud point to stimulate the division of cambium cells. Remember, patience and continuous care are the keys to revitalizing old jasmine branches.